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a2fb1b05 ILT |
1 | // output.cc -- manage the output file for gold |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include <cstdlib> | |
61ba1cf9 ILT |
26 | #include <cerrno> |
27 | #include <fcntl.h> | |
28 | #include <unistd.h> | |
29 | #include <sys/mman.h> | |
4e9d8586 | 30 | #include <sys/stat.h> |
75f65a3e | 31 | #include <algorithm> |
5ffcaa86 | 32 | #include "libiberty.h" // for unlink_if_ordinary() |
a2fb1b05 | 33 | |
7e1edb90 | 34 | #include "parameters.h" |
a2fb1b05 | 35 | #include "object.h" |
ead1e424 ILT |
36 | #include "symtab.h" |
37 | #include "reloc.h" | |
b8e6aad9 | 38 | #include "merge.h" |
a2fb1b05 ILT |
39 | #include "output.h" |
40 | ||
c420411f ILT |
41 | // Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS |
42 | #ifndef MAP_ANONYMOUS | |
43 | # define MAP_ANONYMOUS MAP_ANON | |
44 | #endif | |
45 | ||
a2fb1b05 ILT |
46 | namespace gold |
47 | { | |
48 | ||
a3ad94ed ILT |
49 | // Output_data variables. |
50 | ||
27bc2bce | 51 | bool Output_data::allocated_sizes_are_fixed; |
a3ad94ed | 52 | |
a2fb1b05 ILT |
53 | // Output_data methods. |
54 | ||
55 | Output_data::~Output_data() | |
56 | { | |
57 | } | |
58 | ||
730cdc88 ILT |
59 | // Return the default alignment for the target size. |
60 | ||
61 | uint64_t | |
62 | Output_data::default_alignment() | |
63 | { | |
64 | return Output_data::default_alignment_for_size(parameters->get_size()); | |
65 | } | |
66 | ||
75f65a3e ILT |
67 | // Return the default alignment for a size--32 or 64. |
68 | ||
69 | uint64_t | |
730cdc88 | 70 | Output_data::default_alignment_for_size(int size) |
75f65a3e ILT |
71 | { |
72 | if (size == 32) | |
73 | return 4; | |
74 | else if (size == 64) | |
75 | return 8; | |
76 | else | |
a3ad94ed | 77 | gold_unreachable(); |
75f65a3e ILT |
78 | } |
79 | ||
75f65a3e ILT |
80 | // Output_section_header methods. This currently assumes that the |
81 | // segment and section lists are complete at construction time. | |
82 | ||
83 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
84 | const Layout* layout, |
85 | const Layout::Segment_list* segment_list, | |
86 | const Layout::Section_list* unattached_section_list, | |
61ba1cf9 | 87 | const Stringpool* secnamepool) |
9025d29d | 88 | : layout_(layout), |
75f65a3e | 89 | segment_list_(segment_list), |
a3ad94ed | 90 | unattached_section_list_(unattached_section_list), |
61ba1cf9 | 91 | secnamepool_(secnamepool) |
75f65a3e | 92 | { |
61ba1cf9 ILT |
93 | // Count all the sections. Start with 1 for the null section. |
94 | off_t count = 1; | |
16649710 ILT |
95 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); |
96 | p != segment_list->end(); | |
75f65a3e | 97 | ++p) |
ead1e424 ILT |
98 | if ((*p)->type() == elfcpp::PT_LOAD) |
99 | count += (*p)->output_section_count(); | |
16649710 | 100 | count += unattached_section_list->size(); |
75f65a3e | 101 | |
9025d29d | 102 | const int size = parameters->get_size(); |
75f65a3e ILT |
103 | int shdr_size; |
104 | if (size == 32) | |
105 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
106 | else if (size == 64) | |
107 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
108 | else | |
a3ad94ed | 109 | gold_unreachable(); |
75f65a3e ILT |
110 | |
111 | this->set_data_size(count * shdr_size); | |
112 | } | |
113 | ||
61ba1cf9 ILT |
114 | // Write out the section headers. |
115 | ||
75f65a3e | 116 | void |
61ba1cf9 | 117 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 118 | { |
9025d29d | 119 | if (parameters->get_size() == 32) |
61ba1cf9 | 120 | { |
9025d29d ILT |
121 | if (parameters->is_big_endian()) |
122 | { | |
123 | #ifdef HAVE_TARGET_32_BIG | |
124 | this->do_sized_write<32, true>(of); | |
125 | #else | |
126 | gold_unreachable(); | |
127 | #endif | |
128 | } | |
61ba1cf9 | 129 | else |
9025d29d ILT |
130 | { |
131 | #ifdef HAVE_TARGET_32_LITTLE | |
132 | this->do_sized_write<32, false>(of); | |
133 | #else | |
134 | gold_unreachable(); | |
135 | #endif | |
136 | } | |
61ba1cf9 | 137 | } |
9025d29d | 138 | else if (parameters->get_size() == 64) |
61ba1cf9 | 139 | { |
9025d29d ILT |
140 | if (parameters->is_big_endian()) |
141 | { | |
142 | #ifdef HAVE_TARGET_64_BIG | |
143 | this->do_sized_write<64, true>(of); | |
144 | #else | |
145 | gold_unreachable(); | |
146 | #endif | |
147 | } | |
61ba1cf9 | 148 | else |
9025d29d ILT |
149 | { |
150 | #ifdef HAVE_TARGET_64_LITTLE | |
151 | this->do_sized_write<64, false>(of); | |
152 | #else | |
153 | gold_unreachable(); | |
154 | #endif | |
155 | } | |
61ba1cf9 ILT |
156 | } |
157 | else | |
a3ad94ed | 158 | gold_unreachable(); |
61ba1cf9 ILT |
159 | } |
160 | ||
161 | template<int size, bool big_endian> | |
162 | void | |
163 | Output_section_headers::do_sized_write(Output_file* of) | |
164 | { | |
165 | off_t all_shdrs_size = this->data_size(); | |
166 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
167 | ||
168 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
169 | unsigned char* v = view; | |
170 | ||
171 | { | |
172 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
173 | oshdr.put_sh_name(0); | |
174 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
175 | oshdr.put_sh_flags(0); | |
176 | oshdr.put_sh_addr(0); | |
177 | oshdr.put_sh_offset(0); | |
178 | oshdr.put_sh_size(0); | |
179 | oshdr.put_sh_link(0); | |
180 | oshdr.put_sh_info(0); | |
181 | oshdr.put_sh_addralign(0); | |
182 | oshdr.put_sh_entsize(0); | |
183 | } | |
184 | ||
185 | v += shdr_size; | |
186 | ||
ead1e424 | 187 | unsigned shndx = 1; |
16649710 ILT |
188 | for (Layout::Segment_list::const_iterator p = this->segment_list_->begin(); |
189 | p != this->segment_list_->end(); | |
61ba1cf9 | 190 | ++p) |
593f47df | 191 | v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
16649710 | 192 | this->layout_, this->secnamepool_, v, &shndx |
ead1e424 | 193 | SELECT_SIZE_ENDIAN(size, big_endian)); |
a3ad94ed | 194 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
195 | this->unattached_section_list_->begin(); |
196 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
197 | ++p) |
198 | { | |
a3ad94ed | 199 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 200 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 201 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 202 | v += shdr_size; |
ead1e424 | 203 | ++shndx; |
61ba1cf9 ILT |
204 | } |
205 | ||
206 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
207 | } |
208 | ||
54dc6425 ILT |
209 | // Output_segment_header methods. |
210 | ||
61ba1cf9 | 211 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 212 | const Layout::Segment_list& segment_list) |
9025d29d | 213 | : segment_list_(segment_list) |
61ba1cf9 | 214 | { |
9025d29d | 215 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
216 | int phdr_size; |
217 | if (size == 32) | |
218 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
219 | else if (size == 64) | |
220 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
221 | else | |
a3ad94ed | 222 | gold_unreachable(); |
61ba1cf9 ILT |
223 | |
224 | this->set_data_size(segment_list.size() * phdr_size); | |
225 | } | |
226 | ||
54dc6425 | 227 | void |
61ba1cf9 | 228 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 229 | { |
9025d29d | 230 | if (parameters->get_size() == 32) |
61ba1cf9 | 231 | { |
9025d29d ILT |
232 | if (parameters->is_big_endian()) |
233 | { | |
234 | #ifdef HAVE_TARGET_32_BIG | |
235 | this->do_sized_write<32, true>(of); | |
236 | #else | |
237 | gold_unreachable(); | |
238 | #endif | |
239 | } | |
61ba1cf9 | 240 | else |
9025d29d ILT |
241 | { |
242 | #ifdef HAVE_TARGET_32_LITTLE | |
61ba1cf9 | 243 | this->do_sized_write<32, false>(of); |
9025d29d ILT |
244 | #else |
245 | gold_unreachable(); | |
246 | #endif | |
247 | } | |
61ba1cf9 | 248 | } |
9025d29d | 249 | else if (parameters->get_size() == 64) |
61ba1cf9 | 250 | { |
9025d29d ILT |
251 | if (parameters->is_big_endian()) |
252 | { | |
253 | #ifdef HAVE_TARGET_64_BIG | |
254 | this->do_sized_write<64, true>(of); | |
255 | #else | |
256 | gold_unreachable(); | |
257 | #endif | |
258 | } | |
61ba1cf9 | 259 | else |
9025d29d ILT |
260 | { |
261 | #ifdef HAVE_TARGET_64_LITTLE | |
262 | this->do_sized_write<64, false>(of); | |
263 | #else | |
264 | gold_unreachable(); | |
265 | #endif | |
266 | } | |
61ba1cf9 ILT |
267 | } |
268 | else | |
a3ad94ed | 269 | gold_unreachable(); |
61ba1cf9 ILT |
270 | } |
271 | ||
272 | template<int size, bool big_endian> | |
273 | void | |
274 | Output_segment_headers::do_sized_write(Output_file* of) | |
275 | { | |
276 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
277 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
a445fddf | 278 | gold_assert(all_phdrs_size == this->data_size()); |
61ba1cf9 ILT |
279 | unsigned char* view = of->get_output_view(this->offset(), |
280 | all_phdrs_size); | |
281 | unsigned char* v = view; | |
282 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
283 | p != this->segment_list_.end(); | |
284 | ++p) | |
285 | { | |
286 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
287 | (*p)->write_header(&ophdr); | |
288 | v += phdr_size; | |
289 | } | |
290 | ||
a445fddf ILT |
291 | gold_assert(v - view == all_phdrs_size); |
292 | ||
61ba1cf9 | 293 | of->write_output_view(this->offset(), all_phdrs_size, view); |
75f65a3e ILT |
294 | } |
295 | ||
296 | // Output_file_header methods. | |
297 | ||
9025d29d | 298 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e | 299 | const Symbol_table* symtab, |
d391083d ILT |
300 | const Output_segment_headers* osh, |
301 | const char* entry) | |
9025d29d | 302 | : target_(target), |
75f65a3e | 303 | symtab_(symtab), |
61ba1cf9 | 304 | segment_header_(osh), |
75f65a3e | 305 | section_header_(NULL), |
d391083d ILT |
306 | shstrtab_(NULL), |
307 | entry_(entry) | |
75f65a3e | 308 | { |
9025d29d | 309 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
310 | int ehdr_size; |
311 | if (size == 32) | |
312 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
313 | else if (size == 64) | |
314 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
315 | else | |
a3ad94ed | 316 | gold_unreachable(); |
61ba1cf9 ILT |
317 | |
318 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
319 | } |
320 | ||
321 | // Set the section table information for a file header. | |
322 | ||
323 | void | |
324 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
325 | const Output_section* shstrtab) | |
326 | { | |
327 | this->section_header_ = shdrs; | |
328 | this->shstrtab_ = shstrtab; | |
329 | } | |
330 | ||
331 | // Write out the file header. | |
332 | ||
333 | void | |
61ba1cf9 | 334 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 335 | { |
27bc2bce ILT |
336 | gold_assert(this->offset() == 0); |
337 | ||
9025d29d | 338 | if (parameters->get_size() == 32) |
61ba1cf9 | 339 | { |
9025d29d ILT |
340 | if (parameters->is_big_endian()) |
341 | { | |
342 | #ifdef HAVE_TARGET_32_BIG | |
343 | this->do_sized_write<32, true>(of); | |
344 | #else | |
345 | gold_unreachable(); | |
346 | #endif | |
347 | } | |
61ba1cf9 | 348 | else |
9025d29d ILT |
349 | { |
350 | #ifdef HAVE_TARGET_32_LITTLE | |
351 | this->do_sized_write<32, false>(of); | |
352 | #else | |
353 | gold_unreachable(); | |
354 | #endif | |
355 | } | |
61ba1cf9 | 356 | } |
9025d29d | 357 | else if (parameters->get_size() == 64) |
61ba1cf9 | 358 | { |
9025d29d ILT |
359 | if (parameters->is_big_endian()) |
360 | { | |
361 | #ifdef HAVE_TARGET_64_BIG | |
362 | this->do_sized_write<64, true>(of); | |
363 | #else | |
364 | gold_unreachable(); | |
365 | #endif | |
366 | } | |
61ba1cf9 | 367 | else |
9025d29d ILT |
368 | { |
369 | #ifdef HAVE_TARGET_64_LITTLE | |
370 | this->do_sized_write<64, false>(of); | |
371 | #else | |
372 | gold_unreachable(); | |
373 | #endif | |
374 | } | |
61ba1cf9 ILT |
375 | } |
376 | else | |
a3ad94ed | 377 | gold_unreachable(); |
61ba1cf9 ILT |
378 | } |
379 | ||
380 | // Write out the file header with appropriate size and endianess. | |
381 | ||
382 | template<int size, bool big_endian> | |
383 | void | |
384 | Output_file_header::do_sized_write(Output_file* of) | |
385 | { | |
a3ad94ed | 386 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
387 | |
388 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
389 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
390 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
391 | ||
392 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
393 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
394 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
395 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
396 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
397 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
398 | if (size == 32) | |
399 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
400 | else if (size == 64) | |
401 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
402 | else | |
a3ad94ed | 403 | gold_unreachable(); |
61ba1cf9 ILT |
404 | e_ident[elfcpp::EI_DATA] = (big_endian |
405 | ? elfcpp::ELFDATA2MSB | |
406 | : elfcpp::ELFDATA2LSB); | |
407 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
408 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
409 | oehdr.put_e_ident(e_ident); | |
410 | ||
411 | elfcpp::ET e_type; | |
7e1edb90 | 412 | if (parameters->output_is_object()) |
61ba1cf9 | 413 | e_type = elfcpp::ET_REL; |
436ca963 ILT |
414 | else if (parameters->output_is_shared()) |
415 | e_type = elfcpp::ET_DYN; | |
61ba1cf9 ILT |
416 | else |
417 | e_type = elfcpp::ET_EXEC; | |
418 | oehdr.put_e_type(e_type); | |
419 | ||
420 | oehdr.put_e_machine(this->target_->machine_code()); | |
421 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
422 | ||
d391083d | 423 | oehdr.put_e_entry(this->entry<size>()); |
61ba1cf9 ILT |
424 | |
425 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
426 | oehdr.put_e_shoff(this->section_header_->offset()); | |
427 | ||
428 | // FIXME: The target needs to set the flags. | |
429 | oehdr.put_e_flags(0); | |
430 | ||
431 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
432 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
433 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
434 | / elfcpp::Elf_sizes<size>::phdr_size); | |
435 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
436 | oehdr.put_e_shnum(this->section_header_->data_size() | |
437 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 438 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
439 | |
440 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
441 | } |
442 | ||
d391083d ILT |
443 | // Return the value to use for the entry address. THIS->ENTRY_ is the |
444 | // symbol specified on the command line, if any. | |
445 | ||
446 | template<int size> | |
447 | typename elfcpp::Elf_types<size>::Elf_Addr | |
448 | Output_file_header::entry() | |
449 | { | |
450 | const bool should_issue_warning = (this->entry_ != NULL | |
451 | && parameters->output_is_executable()); | |
452 | ||
453 | // FIXME: Need to support target specific entry symbol. | |
454 | const char* entry = this->entry_; | |
455 | if (entry == NULL) | |
456 | entry = "_start"; | |
457 | ||
458 | Symbol* sym = this->symtab_->lookup(entry); | |
459 | ||
460 | typename Sized_symbol<size>::Value_type v; | |
461 | if (sym != NULL) | |
462 | { | |
463 | Sized_symbol<size>* ssym; | |
464 | ssym = this->symtab_->get_sized_symbol<size>(sym); | |
465 | if (!ssym->is_defined() && should_issue_warning) | |
466 | gold_warning("entry symbol '%s' exists but is not defined", entry); | |
467 | v = ssym->value(); | |
468 | } | |
469 | else | |
470 | { | |
471 | // We couldn't find the entry symbol. See if we can parse it as | |
472 | // a number. This supports, e.g., -e 0x1000. | |
473 | char* endptr; | |
474 | v = strtoull(entry, &endptr, 0); | |
475 | if (*endptr != '\0') | |
476 | { | |
477 | if (should_issue_warning) | |
478 | gold_warning("cannot find entry symbol '%s'", entry); | |
479 | v = 0; | |
480 | } | |
481 | } | |
482 | ||
483 | return v; | |
484 | } | |
485 | ||
dbe717ef ILT |
486 | // Output_data_const methods. |
487 | ||
488 | void | |
a3ad94ed | 489 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 490 | { |
a3ad94ed ILT |
491 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
492 | } | |
493 | ||
494 | // Output_data_const_buffer methods. | |
495 | ||
496 | void | |
497 | Output_data_const_buffer::do_write(Output_file* of) | |
498 | { | |
499 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
500 | } |
501 | ||
502 | // Output_section_data methods. | |
503 | ||
16649710 ILT |
504 | // Record the output section, and set the entry size and such. |
505 | ||
506 | void | |
507 | Output_section_data::set_output_section(Output_section* os) | |
508 | { | |
509 | gold_assert(this->output_section_ == NULL); | |
510 | this->output_section_ = os; | |
511 | this->do_adjust_output_section(os); | |
512 | } | |
513 | ||
514 | // Return the section index of the output section. | |
515 | ||
dbe717ef ILT |
516 | unsigned int |
517 | Output_section_data::do_out_shndx() const | |
518 | { | |
a3ad94ed | 519 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
520 | return this->output_section_->out_shndx(); |
521 | } | |
522 | ||
a3ad94ed ILT |
523 | // Output_data_strtab methods. |
524 | ||
27bc2bce | 525 | // Set the final data size. |
a3ad94ed ILT |
526 | |
527 | void | |
27bc2bce | 528 | Output_data_strtab::set_final_data_size() |
a3ad94ed ILT |
529 | { |
530 | this->strtab_->set_string_offsets(); | |
531 | this->set_data_size(this->strtab_->get_strtab_size()); | |
532 | } | |
533 | ||
534 | // Write out a string table. | |
535 | ||
536 | void | |
537 | Output_data_strtab::do_write(Output_file* of) | |
538 | { | |
539 | this->strtab_->write(of, this->offset()); | |
540 | } | |
541 | ||
c06b7b0b ILT |
542 | // Output_reloc methods. |
543 | ||
7bf1f802 ILT |
544 | // A reloc against a global symbol. |
545 | ||
546 | template<bool dynamic, int size, bool big_endian> | |
547 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
548 | Symbol* gsym, | |
549 | unsigned int type, | |
550 | Output_data* od, | |
e8c846c3 ILT |
551 | Address address, |
552 | bool is_relative) | |
7bf1f802 | 553 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
e8c846c3 | 554 | is_relative_(is_relative), shndx_(INVALID_CODE) |
7bf1f802 ILT |
555 | { |
556 | this->u1_.gsym = gsym; | |
557 | this->u2_.od = od; | |
e8c846c3 | 558 | if (dynamic && !is_relative) |
7bf1f802 ILT |
559 | gsym->set_needs_dynsym_entry(); |
560 | } | |
561 | ||
562 | template<bool dynamic, int size, bool big_endian> | |
563 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
564 | Symbol* gsym, | |
565 | unsigned int type, | |
566 | Relobj* relobj, | |
567 | unsigned int shndx, | |
e8c846c3 ILT |
568 | Address address, |
569 | bool is_relative) | |
7bf1f802 | 570 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
e8c846c3 | 571 | is_relative_(is_relative), shndx_(shndx) |
7bf1f802 ILT |
572 | { |
573 | gold_assert(shndx != INVALID_CODE); | |
574 | this->u1_.gsym = gsym; | |
575 | this->u2_.relobj = relobj; | |
e8c846c3 | 576 | if (dynamic && !is_relative) |
7bf1f802 ILT |
577 | gsym->set_needs_dynsym_entry(); |
578 | } | |
579 | ||
580 | // A reloc against a local symbol. | |
581 | ||
582 | template<bool dynamic, int size, bool big_endian> | |
583 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
584 | Sized_relobj<size, big_endian>* relobj, | |
585 | unsigned int local_sym_index, | |
586 | unsigned int type, | |
587 | Output_data* od, | |
e8c846c3 ILT |
588 | Address address, |
589 | bool is_relative) | |
7bf1f802 | 590 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
e8c846c3 | 591 | is_relative_(is_relative), shndx_(INVALID_CODE) |
7bf1f802 ILT |
592 | { |
593 | gold_assert(local_sym_index != GSYM_CODE | |
594 | && local_sym_index != INVALID_CODE); | |
595 | this->u1_.relobj = relobj; | |
596 | this->u2_.od = od; | |
e8c846c3 | 597 | if (dynamic && !is_relative) |
7bf1f802 ILT |
598 | relobj->set_needs_output_dynsym_entry(local_sym_index); |
599 | } | |
600 | ||
601 | template<bool dynamic, int size, bool big_endian> | |
602 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
603 | Sized_relobj<size, big_endian>* relobj, | |
604 | unsigned int local_sym_index, | |
605 | unsigned int type, | |
606 | unsigned int shndx, | |
e8c846c3 ILT |
607 | Address address, |
608 | bool is_relative) | |
7bf1f802 | 609 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
e8c846c3 | 610 | is_relative_(is_relative), shndx_(shndx) |
7bf1f802 ILT |
611 | { |
612 | gold_assert(local_sym_index != GSYM_CODE | |
613 | && local_sym_index != INVALID_CODE); | |
614 | gold_assert(shndx != INVALID_CODE); | |
615 | this->u1_.relobj = relobj; | |
616 | this->u2_.relobj = relobj; | |
e8c846c3 | 617 | if (dynamic && !is_relative) |
7bf1f802 ILT |
618 | relobj->set_needs_output_dynsym_entry(local_sym_index); |
619 | } | |
620 | ||
621 | // A reloc against the STT_SECTION symbol of an output section. | |
622 | ||
623 | template<bool dynamic, int size, bool big_endian> | |
624 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
625 | Output_section* os, | |
626 | unsigned int type, | |
627 | Output_data* od, | |
628 | Address address) | |
629 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
e8c846c3 | 630 | is_relative_(false), shndx_(INVALID_CODE) |
7bf1f802 ILT |
631 | { |
632 | this->u1_.os = os; | |
633 | this->u2_.od = od; | |
634 | if (dynamic) | |
635 | os->set_needs_dynsym_index(); | |
636 | } | |
637 | ||
638 | template<bool dynamic, int size, bool big_endian> | |
639 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
640 | Output_section* os, | |
641 | unsigned int type, | |
642 | Relobj* relobj, | |
643 | unsigned int shndx, | |
644 | Address address) | |
645 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
e8c846c3 | 646 | is_relative_(false), shndx_(shndx) |
7bf1f802 ILT |
647 | { |
648 | gold_assert(shndx != INVALID_CODE); | |
649 | this->u1_.os = os; | |
650 | this->u2_.relobj = relobj; | |
651 | if (dynamic) | |
652 | os->set_needs_dynsym_index(); | |
653 | } | |
654 | ||
c06b7b0b ILT |
655 | // Get the symbol index of a relocation. |
656 | ||
657 | template<bool dynamic, int size, bool big_endian> | |
658 | unsigned int | |
659 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
660 | const | |
661 | { | |
662 | unsigned int index; | |
663 | switch (this->local_sym_index_) | |
664 | { | |
665 | case INVALID_CODE: | |
a3ad94ed | 666 | gold_unreachable(); |
c06b7b0b ILT |
667 | |
668 | case GSYM_CODE: | |
5a6f7e2d | 669 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
670 | index = 0; |
671 | else if (dynamic) | |
5a6f7e2d | 672 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 673 | else |
5a6f7e2d | 674 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
675 | break; |
676 | ||
677 | case SECTION_CODE: | |
678 | if (dynamic) | |
5a6f7e2d | 679 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 680 | else |
5a6f7e2d | 681 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
682 | break; |
683 | ||
436ca963 ILT |
684 | case 0: |
685 | // Relocations without symbols use a symbol index of 0. | |
686 | index = 0; | |
687 | break; | |
688 | ||
c06b7b0b ILT |
689 | default: |
690 | if (dynamic) | |
7bf1f802 | 691 | index = this->u1_.relobj->dynsym_index(this->local_sym_index_); |
c06b7b0b | 692 | else |
5a6f7e2d | 693 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
694 | break; |
695 | } | |
a3ad94ed | 696 | gold_assert(index != -1U); |
c06b7b0b ILT |
697 | return index; |
698 | } | |
699 | ||
700 | // Write out the offset and info fields of a Rel or Rela relocation | |
701 | // entry. | |
702 | ||
703 | template<bool dynamic, int size, bool big_endian> | |
704 | template<typename Write_rel> | |
705 | void | |
706 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
707 | Write_rel* wr) const | |
708 | { | |
a3ad94ed | 709 | Address address = this->address_; |
5a6f7e2d ILT |
710 | if (this->shndx_ != INVALID_CODE) |
711 | { | |
8383303e | 712 | section_offset_type off; |
5a6f7e2d ILT |
713 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, |
714 | &off); | |
715 | gold_assert(os != NULL); | |
730cdc88 ILT |
716 | if (off != -1) |
717 | address += os->address() + off; | |
718 | else | |
719 | { | |
720 | address = os->output_address(this->u2_.relobj, this->shndx_, | |
721 | address); | |
722 | gold_assert(address != -1U); | |
723 | } | |
5a6f7e2d ILT |
724 | } |
725 | else if (this->u2_.od != NULL) | |
726 | address += this->u2_.od->address(); | |
a3ad94ed | 727 | wr->put_r_offset(address); |
e8c846c3 ILT |
728 | unsigned int sym_index = this->is_relative_ ? 0 : this->get_symbol_index(); |
729 | wr->put_r_info(elfcpp::elf_r_info<size>(sym_index, this->type_)); | |
c06b7b0b ILT |
730 | } |
731 | ||
732 | // Write out a Rel relocation. | |
733 | ||
734 | template<bool dynamic, int size, bool big_endian> | |
735 | void | |
736 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
737 | unsigned char* pov) const | |
738 | { | |
739 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
740 | this->write_rel(&orel); | |
741 | } | |
742 | ||
e8c846c3 ILT |
743 | // Get the value of the symbol referred to by a Rel relocation. |
744 | ||
745 | template<bool dynamic, int size, bool big_endian> | |
746 | typename elfcpp::Elf_types<size>::Elf_Addr | |
747 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::symbol_value() const | |
748 | { | |
749 | if (this->local_sym_index_ == GSYM_CODE) | |
750 | { | |
751 | const Sized_symbol<size>* sym; | |
752 | sym = static_cast<const Sized_symbol<size>*>(this->u1_.gsym); | |
753 | return sym->value(); | |
754 | } | |
755 | gold_assert(this->local_sym_index_ != SECTION_CODE | |
756 | && this->local_sym_index_ != INVALID_CODE); | |
757 | const Sized_relobj<size, big_endian>* relobj = this->u1_.relobj; | |
758 | return relobj->local_symbol_value(this->local_sym_index_); | |
759 | } | |
760 | ||
c06b7b0b ILT |
761 | // Write out a Rela relocation. |
762 | ||
763 | template<bool dynamic, int size, bool big_endian> | |
764 | void | |
765 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
766 | unsigned char* pov) const | |
767 | { | |
768 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
769 | this->rel_.write_rel(&orel); | |
e8c846c3 ILT |
770 | Addend addend = this->addend_; |
771 | if (rel_.is_relative()) | |
772 | addend += rel_.symbol_value(); | |
773 | orel.put_r_addend(addend); | |
c06b7b0b ILT |
774 | } |
775 | ||
776 | // Output_data_reloc_base methods. | |
777 | ||
16649710 ILT |
778 | // Adjust the output section. |
779 | ||
780 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
781 | void | |
782 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
783 | ::do_adjust_output_section(Output_section* os) | |
784 | { | |
785 | if (sh_type == elfcpp::SHT_REL) | |
786 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
787 | else if (sh_type == elfcpp::SHT_RELA) | |
788 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
789 | else | |
790 | gold_unreachable(); | |
791 | if (dynamic) | |
792 | os->set_should_link_to_dynsym(); | |
793 | else | |
794 | os->set_should_link_to_symtab(); | |
795 | } | |
796 | ||
c06b7b0b ILT |
797 | // Write out relocation data. |
798 | ||
799 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
800 | void | |
801 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
802 | Output_file* of) | |
803 | { | |
804 | const off_t off = this->offset(); | |
805 | const off_t oview_size = this->data_size(); | |
806 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
807 | ||
808 | unsigned char* pov = oview; | |
809 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
810 | p != this->relocs_.end(); | |
811 | ++p) | |
812 | { | |
813 | p->write(pov); | |
814 | pov += reloc_size; | |
815 | } | |
816 | ||
a3ad94ed | 817 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
818 | |
819 | of->write_output_view(off, oview_size, oview); | |
820 | ||
821 | // We no longer need the relocation entries. | |
822 | this->relocs_.clear(); | |
823 | } | |
824 | ||
dbe717ef | 825 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
826 | |
827 | // Write out the entry. | |
828 | ||
829 | template<int size, bool big_endian> | |
830 | void | |
7e1edb90 | 831 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
832 | { |
833 | Valtype val = 0; | |
834 | ||
835 | switch (this->local_sym_index_) | |
836 | { | |
837 | case GSYM_CODE: | |
838 | { | |
e8c846c3 ILT |
839 | // If the symbol is resolved locally, we need to write out the |
840 | // link-time value, which will be relocated dynamically by a | |
841 | // RELATIVE relocation. | |
ead1e424 | 842 | Symbol* gsym = this->u_.gsym; |
e8c846c3 ILT |
843 | Sized_symbol<size>* sgsym; |
844 | // This cast is a bit ugly. We don't want to put a | |
845 | // virtual method in Symbol, because we want Symbol to be | |
846 | // as small as possible. | |
847 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
848 | val = sgsym->value(); | |
ead1e424 ILT |
849 | } |
850 | break; | |
851 | ||
852 | case CONSTANT_CODE: | |
853 | val = this->u_.constant; | |
854 | break; | |
855 | ||
856 | default: | |
e727fa71 ILT |
857 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
858 | break; | |
ead1e424 ILT |
859 | } |
860 | ||
a3ad94ed | 861 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
862 | } |
863 | ||
dbe717ef | 864 | // Output_data_got methods. |
ead1e424 | 865 | |
dbe717ef ILT |
866 | // Add an entry for a global symbol to the GOT. This returns true if |
867 | // this is a new GOT entry, false if the symbol already had a GOT | |
868 | // entry. | |
869 | ||
870 | template<int size, bool big_endian> | |
871 | bool | |
872 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 873 | { |
dbe717ef ILT |
874 | if (gsym->has_got_offset()) |
875 | return false; | |
ead1e424 | 876 | |
dbe717ef ILT |
877 | this->entries_.push_back(Got_entry(gsym)); |
878 | this->set_got_size(); | |
879 | gsym->set_got_offset(this->last_got_offset()); | |
880 | return true; | |
881 | } | |
ead1e424 | 882 | |
7bf1f802 ILT |
883 | // Add an entry for a global symbol to the GOT, and add a dynamic |
884 | // relocation of type R_TYPE for the GOT entry. | |
885 | template<int size, bool big_endian> | |
886 | void | |
887 | Output_data_got<size, big_endian>::add_global_with_rel( | |
888 | Symbol* gsym, | |
889 | Rel_dyn* rel_dyn, | |
890 | unsigned int r_type) | |
891 | { | |
892 | if (gsym->has_got_offset()) | |
893 | return; | |
894 | ||
895 | this->entries_.push_back(Got_entry()); | |
896 | this->set_got_size(); | |
897 | unsigned int got_offset = this->last_got_offset(); | |
898 | gsym->set_got_offset(got_offset); | |
899 | rel_dyn->add_global(gsym, r_type, this, got_offset); | |
900 | } | |
901 | ||
902 | template<int size, bool big_endian> | |
903 | void | |
904 | Output_data_got<size, big_endian>::add_global_with_rela( | |
905 | Symbol* gsym, | |
906 | Rela_dyn* rela_dyn, | |
907 | unsigned int r_type) | |
908 | { | |
909 | if (gsym->has_got_offset()) | |
910 | return; | |
911 | ||
912 | this->entries_.push_back(Got_entry()); | |
913 | this->set_got_size(); | |
914 | unsigned int got_offset = this->last_got_offset(); | |
915 | gsym->set_got_offset(got_offset); | |
916 | rela_dyn->add_global(gsym, r_type, this, got_offset, 0); | |
917 | } | |
918 | ||
e727fa71 ILT |
919 | // Add an entry for a local symbol to the GOT. This returns true if |
920 | // this is a new GOT entry, false if the symbol already has a GOT | |
921 | // entry. | |
922 | ||
923 | template<int size, bool big_endian> | |
924 | bool | |
925 | Output_data_got<size, big_endian>::add_local( | |
926 | Sized_relobj<size, big_endian>* object, | |
927 | unsigned int symndx) | |
928 | { | |
929 | if (object->local_has_got_offset(symndx)) | |
930 | return false; | |
07f397ab | 931 | |
e727fa71 ILT |
932 | this->entries_.push_back(Got_entry(object, symndx)); |
933 | this->set_got_size(); | |
934 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
935 | return true; | |
936 | } | |
937 | ||
7bf1f802 ILT |
938 | // Add an entry for a local symbol to the GOT, and add a dynamic |
939 | // relocation of type R_TYPE for the GOT entry. | |
940 | template<int size, bool big_endian> | |
941 | void | |
942 | Output_data_got<size, big_endian>::add_local_with_rel( | |
943 | Sized_relobj<size, big_endian>* object, | |
944 | unsigned int symndx, | |
945 | Rel_dyn* rel_dyn, | |
946 | unsigned int r_type) | |
947 | { | |
948 | if (object->local_has_got_offset(symndx)) | |
949 | return; | |
950 | ||
951 | this->entries_.push_back(Got_entry()); | |
952 | this->set_got_size(); | |
953 | unsigned int got_offset = this->last_got_offset(); | |
954 | object->set_local_got_offset(symndx, got_offset); | |
955 | rel_dyn->add_local(object, symndx, r_type, this, got_offset); | |
956 | } | |
957 | ||
958 | template<int size, bool big_endian> | |
959 | void | |
960 | Output_data_got<size, big_endian>::add_local_with_rela( | |
961 | Sized_relobj<size, big_endian>* object, | |
962 | unsigned int symndx, | |
963 | Rela_dyn* rela_dyn, | |
964 | unsigned int r_type) | |
965 | { | |
966 | if (object->local_has_got_offset(symndx)) | |
967 | return; | |
968 | ||
969 | this->entries_.push_back(Got_entry()); | |
970 | this->set_got_size(); | |
971 | unsigned int got_offset = this->last_got_offset(); | |
972 | object->set_local_got_offset(symndx, got_offset); | |
973 | rela_dyn->add_local(object, symndx, r_type, this, got_offset, 0); | |
974 | } | |
975 | ||
07f397ab ILT |
976 | // Add an entry (or a pair of entries) for a global TLS symbol to the GOT. |
977 | // In a pair of entries, the first value in the pair will be used for the | |
978 | // module index, and the second value will be used for the dtv-relative | |
979 | // offset. This returns true if this is a new GOT entry, false if the symbol | |
980 | // already has a GOT entry. | |
981 | ||
982 | template<int size, bool big_endian> | |
983 | bool | |
7bf1f802 | 984 | Output_data_got<size, big_endian>::add_global_tls(Symbol* gsym, bool need_pair) |
07f397ab ILT |
985 | { |
986 | if (gsym->has_tls_got_offset(need_pair)) | |
987 | return false; | |
988 | ||
989 | this->entries_.push_back(Got_entry(gsym)); | |
990 | gsym->set_tls_got_offset(this->last_got_offset(), need_pair); | |
991 | if (need_pair) | |
992 | this->entries_.push_back(Got_entry(gsym)); | |
993 | this->set_got_size(); | |
994 | return true; | |
995 | } | |
996 | ||
7bf1f802 ILT |
997 | // Add an entry for a global TLS symbol to the GOT, and add a dynamic |
998 | // relocation of type R_TYPE. | |
999 | template<int size, bool big_endian> | |
1000 | void | |
1001 | Output_data_got<size, big_endian>::add_global_tls_with_rel( | |
1002 | Symbol* gsym, | |
1003 | Rel_dyn* rel_dyn, | |
1004 | unsigned int r_type) | |
1005 | { | |
1006 | if (gsym->has_tls_got_offset(false)) | |
1007 | return; | |
1008 | ||
1009 | this->entries_.push_back(Got_entry()); | |
1010 | this->set_got_size(); | |
1011 | unsigned int got_offset = this->last_got_offset(); | |
1012 | gsym->set_tls_got_offset(got_offset, false); | |
1013 | rel_dyn->add_global(gsym, r_type, this, got_offset); | |
1014 | } | |
1015 | ||
1016 | template<int size, bool big_endian> | |
1017 | void | |
1018 | Output_data_got<size, big_endian>::add_global_tls_with_rela( | |
1019 | Symbol* gsym, | |
1020 | Rela_dyn* rela_dyn, | |
1021 | unsigned int r_type) | |
1022 | { | |
1023 | if (gsym->has_tls_got_offset(false)) | |
1024 | return; | |
1025 | ||
1026 | this->entries_.push_back(Got_entry()); | |
1027 | this->set_got_size(); | |
1028 | unsigned int got_offset = this->last_got_offset(); | |
1029 | gsym->set_tls_got_offset(got_offset, false); | |
1030 | rela_dyn->add_global(gsym, r_type, this, got_offset, 0); | |
1031 | } | |
1032 | ||
1033 | // Add a pair of entries for a global TLS symbol to the GOT, and add | |
1034 | // dynamic relocations of type MOD_R_TYPE and DTV_R_TYPE, respectively. | |
1035 | template<int size, bool big_endian> | |
1036 | void | |
1037 | Output_data_got<size, big_endian>::add_global_tls_with_rel( | |
1038 | Symbol* gsym, | |
1039 | Rel_dyn* rel_dyn, | |
1040 | unsigned int mod_r_type, | |
1041 | unsigned int dtv_r_type) | |
1042 | { | |
1043 | if (gsym->has_tls_got_offset(true)) | |
1044 | return; | |
1045 | ||
1046 | this->entries_.push_back(Got_entry()); | |
1047 | unsigned int got_offset = this->last_got_offset(); | |
1048 | gsym->set_tls_got_offset(got_offset, true); | |
1049 | rel_dyn->add_global(gsym, mod_r_type, this, got_offset); | |
1050 | ||
1051 | this->entries_.push_back(Got_entry()); | |
1052 | this->set_got_size(); | |
1053 | got_offset = this->last_got_offset(); | |
1054 | rel_dyn->add_global(gsym, dtv_r_type, this, got_offset); | |
1055 | } | |
1056 | ||
1057 | template<int size, bool big_endian> | |
1058 | void | |
1059 | Output_data_got<size, big_endian>::add_global_tls_with_rela( | |
1060 | Symbol* gsym, | |
1061 | Rela_dyn* rela_dyn, | |
1062 | unsigned int mod_r_type, | |
1063 | unsigned int dtv_r_type) | |
1064 | { | |
1065 | if (gsym->has_tls_got_offset(true)) | |
1066 | return; | |
1067 | ||
1068 | this->entries_.push_back(Got_entry()); | |
1069 | unsigned int got_offset = this->last_got_offset(); | |
1070 | gsym->set_tls_got_offset(got_offset, true); | |
1071 | rela_dyn->add_global(gsym, mod_r_type, this, got_offset, 0); | |
1072 | ||
1073 | this->entries_.push_back(Got_entry()); | |
1074 | this->set_got_size(); | |
1075 | got_offset = this->last_got_offset(); | |
1076 | rela_dyn->add_global(gsym, dtv_r_type, this, got_offset, 0); | |
1077 | } | |
1078 | ||
07f397ab ILT |
1079 | // Add an entry (or a pair of entries) for a local TLS symbol to the GOT. |
1080 | // In a pair of entries, the first value in the pair will be used for the | |
1081 | // module index, and the second value will be used for the dtv-relative | |
1082 | // offset. This returns true if this is a new GOT entry, false if the symbol | |
1083 | // already has a GOT entry. | |
1084 | ||
1085 | template<int size, bool big_endian> | |
1086 | bool | |
1087 | Output_data_got<size, big_endian>::add_local_tls( | |
1088 | Sized_relobj<size, big_endian>* object, | |
1089 | unsigned int symndx, | |
1090 | bool need_pair) | |
1091 | { | |
1092 | if (object->local_has_tls_got_offset(symndx, need_pair)) | |
1093 | return false; | |
1094 | ||
1095 | this->entries_.push_back(Got_entry(object, symndx)); | |
1096 | object->set_local_tls_got_offset(symndx, this->last_got_offset(), need_pair); | |
1097 | if (need_pair) | |
1098 | this->entries_.push_back(Got_entry(object, symndx)); | |
1099 | this->set_got_size(); | |
1100 | return true; | |
1101 | } | |
1102 | ||
7bf1f802 ILT |
1103 | // Add an entry (or pair of entries) for a local TLS symbol to the GOT, |
1104 | // and add a dynamic relocation of type R_TYPE for the first GOT entry. | |
1105 | // Because this is a local symbol, the first GOT entry can be relocated | |
1106 | // relative to a section symbol, and the second GOT entry will have an | |
1107 | // dtv-relative value that can be computed at link time. | |
1108 | template<int size, bool big_endian> | |
1109 | void | |
1110 | Output_data_got<size, big_endian>::add_local_tls_with_rel( | |
1111 | Sized_relobj<size, big_endian>* object, | |
1112 | unsigned int symndx, | |
1113 | unsigned int shndx, | |
1114 | bool need_pair, | |
1115 | Rel_dyn* rel_dyn, | |
1116 | unsigned int r_type) | |
1117 | { | |
1118 | if (object->local_has_tls_got_offset(symndx, need_pair)) | |
1119 | return; | |
1120 | ||
1121 | this->entries_.push_back(Got_entry()); | |
1122 | unsigned int got_offset = this->last_got_offset(); | |
1123 | object->set_local_tls_got_offset(symndx, got_offset, need_pair); | |
8383303e | 1124 | section_offset_type off; |
7bf1f802 ILT |
1125 | Output_section* os = object->output_section(shndx, &off); |
1126 | rel_dyn->add_output_section(os, r_type, this, got_offset); | |
1127 | ||
1128 | // The second entry of the pair will be statically initialized | |
1129 | // with the TLS offset of the symbol. | |
1130 | if (need_pair) | |
1131 | this->entries_.push_back(Got_entry(object, symndx)); | |
1132 | ||
1133 | this->set_got_size(); | |
1134 | } | |
1135 | ||
1136 | template<int size, bool big_endian> | |
1137 | void | |
1138 | Output_data_got<size, big_endian>::add_local_tls_with_rela( | |
1139 | Sized_relobj<size, big_endian>* object, | |
1140 | unsigned int symndx, | |
1141 | unsigned int shndx, | |
1142 | bool need_pair, | |
1143 | Rela_dyn* rela_dyn, | |
1144 | unsigned int r_type) | |
1145 | { | |
1146 | if (object->local_has_tls_got_offset(symndx, need_pair)) | |
1147 | return; | |
1148 | ||
1149 | this->entries_.push_back(Got_entry()); | |
1150 | unsigned int got_offset = this->last_got_offset(); | |
1151 | object->set_local_tls_got_offset(symndx, got_offset, need_pair); | |
8383303e | 1152 | section_offset_type off; |
7bf1f802 ILT |
1153 | Output_section* os = object->output_section(shndx, &off); |
1154 | rela_dyn->add_output_section(os, r_type, this, got_offset, 0); | |
1155 | ||
1156 | // The second entry of the pair will be statically initialized | |
1157 | // with the TLS offset of the symbol. | |
1158 | if (need_pair) | |
1159 | this->entries_.push_back(Got_entry(object, symndx)); | |
1160 | ||
1161 | this->set_got_size(); | |
1162 | } | |
1163 | ||
ead1e424 ILT |
1164 | // Write out the GOT. |
1165 | ||
1166 | template<int size, bool big_endian> | |
1167 | void | |
dbe717ef | 1168 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
1169 | { |
1170 | const int add = size / 8; | |
1171 | ||
1172 | const off_t off = this->offset(); | |
c06b7b0b | 1173 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
1174 | unsigned char* const oview = of->get_output_view(off, oview_size); |
1175 | ||
1176 | unsigned char* pov = oview; | |
1177 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
1178 | p != this->entries_.end(); | |
1179 | ++p) | |
1180 | { | |
7e1edb90 | 1181 | p->write(pov); |
ead1e424 ILT |
1182 | pov += add; |
1183 | } | |
1184 | ||
a3ad94ed | 1185 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 1186 | |
ead1e424 ILT |
1187 | of->write_output_view(off, oview_size, oview); |
1188 | ||
1189 | // We no longer need the GOT entries. | |
1190 | this->entries_.clear(); | |
1191 | } | |
1192 | ||
a3ad94ed ILT |
1193 | // Output_data_dynamic::Dynamic_entry methods. |
1194 | ||
1195 | // Write out the entry. | |
1196 | ||
1197 | template<int size, bool big_endian> | |
1198 | void | |
1199 | Output_data_dynamic::Dynamic_entry::write( | |
1200 | unsigned char* pov, | |
1ddbd1e6 ILT |
1201 | const Stringpool* pool |
1202 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
1203 | { |
1204 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
1205 | switch (this->classification_) | |
1206 | { | |
1207 | case DYNAMIC_NUMBER: | |
1208 | val = this->u_.val; | |
1209 | break; | |
1210 | ||
1211 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 1212 | val = this->u_.od->address(); |
a3ad94ed ILT |
1213 | break; |
1214 | ||
1215 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 1216 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
1217 | break; |
1218 | ||
1219 | case DYNAMIC_SYMBOL: | |
1220 | { | |
16649710 ILT |
1221 | const Sized_symbol<size>* s = |
1222 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
1223 | val = s->value(); |
1224 | } | |
1225 | break; | |
1226 | ||
1227 | case DYNAMIC_STRING: | |
1228 | val = pool->get_offset(this->u_.str); | |
1229 | break; | |
1230 | ||
1231 | default: | |
1232 | gold_unreachable(); | |
1233 | } | |
1234 | ||
1235 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
1236 | dw.put_d_tag(this->tag_); | |
1237 | dw.put_d_val(val); | |
1238 | } | |
1239 | ||
1240 | // Output_data_dynamic methods. | |
1241 | ||
16649710 ILT |
1242 | // Adjust the output section to set the entry size. |
1243 | ||
1244 | void | |
1245 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
1246 | { | |
9025d29d | 1247 | if (parameters->get_size() == 32) |
16649710 | 1248 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 1249 | else if (parameters->get_size() == 64) |
16649710 ILT |
1250 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
1251 | else | |
1252 | gold_unreachable(); | |
1253 | } | |
1254 | ||
a3ad94ed ILT |
1255 | // Set the final data size. |
1256 | ||
1257 | void | |
27bc2bce | 1258 | Output_data_dynamic::set_final_data_size() |
a3ad94ed ILT |
1259 | { |
1260 | // Add the terminating entry. | |
1261 | this->add_constant(elfcpp::DT_NULL, 0); | |
1262 | ||
1263 | int dyn_size; | |
9025d29d | 1264 | if (parameters->get_size() == 32) |
a3ad94ed | 1265 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 1266 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
1267 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
1268 | else | |
1269 | gold_unreachable(); | |
1270 | this->set_data_size(this->entries_.size() * dyn_size); | |
1271 | } | |
1272 | ||
1273 | // Write out the dynamic entries. | |
1274 | ||
1275 | void | |
1276 | Output_data_dynamic::do_write(Output_file* of) | |
1277 | { | |
9025d29d | 1278 | if (parameters->get_size() == 32) |
a3ad94ed | 1279 | { |
9025d29d ILT |
1280 | if (parameters->is_big_endian()) |
1281 | { | |
1282 | #ifdef HAVE_TARGET_32_BIG | |
1283 | this->sized_write<32, true>(of); | |
1284 | #else | |
1285 | gold_unreachable(); | |
1286 | #endif | |
1287 | } | |
a3ad94ed | 1288 | else |
9025d29d ILT |
1289 | { |
1290 | #ifdef HAVE_TARGET_32_LITTLE | |
1291 | this->sized_write<32, false>(of); | |
1292 | #else | |
1293 | gold_unreachable(); | |
1294 | #endif | |
1295 | } | |
a3ad94ed | 1296 | } |
9025d29d | 1297 | else if (parameters->get_size() == 64) |
a3ad94ed | 1298 | { |
9025d29d ILT |
1299 | if (parameters->is_big_endian()) |
1300 | { | |
1301 | #ifdef HAVE_TARGET_64_BIG | |
1302 | this->sized_write<64, true>(of); | |
1303 | #else | |
1304 | gold_unreachable(); | |
1305 | #endif | |
1306 | } | |
a3ad94ed | 1307 | else |
9025d29d ILT |
1308 | { |
1309 | #ifdef HAVE_TARGET_64_LITTLE | |
1310 | this->sized_write<64, false>(of); | |
1311 | #else | |
1312 | gold_unreachable(); | |
1313 | #endif | |
1314 | } | |
a3ad94ed ILT |
1315 | } |
1316 | else | |
1317 | gold_unreachable(); | |
1318 | } | |
1319 | ||
1320 | template<int size, bool big_endian> | |
1321 | void | |
1322 | Output_data_dynamic::sized_write(Output_file* of) | |
1323 | { | |
1324 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
1325 | ||
1326 | const off_t offset = this->offset(); | |
1327 | const off_t oview_size = this->data_size(); | |
1328 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1329 | ||
1330 | unsigned char* pov = oview; | |
1331 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
1332 | p != this->entries_.end(); | |
1333 | ++p) | |
1334 | { | |
1ddbd1e6 ILT |
1335 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
1336 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
1337 | pov += dyn_size; |
1338 | } | |
1339 | ||
1340 | gold_assert(pov - oview == oview_size); | |
1341 | ||
1342 | of->write_output_view(offset, oview_size, oview); | |
1343 | ||
1344 | // We no longer need the dynamic entries. | |
1345 | this->entries_.clear(); | |
1346 | } | |
1347 | ||
ead1e424 ILT |
1348 | // Output_section::Input_section methods. |
1349 | ||
1350 | // Return the data size. For an input section we store the size here. | |
1351 | // For an Output_section_data, we have to ask it for the size. | |
1352 | ||
1353 | off_t | |
1354 | Output_section::Input_section::data_size() const | |
1355 | { | |
1356 | if (this->is_input_section()) | |
b8e6aad9 | 1357 | return this->u1_.data_size; |
ead1e424 | 1358 | else |
b8e6aad9 | 1359 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
1360 | } |
1361 | ||
1362 | // Set the address and file offset. | |
1363 | ||
1364 | void | |
96803768 ILT |
1365 | Output_section::Input_section::set_address_and_file_offset( |
1366 | uint64_t address, | |
1367 | off_t file_offset, | |
1368 | off_t section_file_offset) | |
ead1e424 ILT |
1369 | { |
1370 | if (this->is_input_section()) | |
96803768 ILT |
1371 | this->u2_.object->set_section_offset(this->shndx_, |
1372 | file_offset - section_file_offset); | |
ead1e424 | 1373 | else |
96803768 ILT |
1374 | this->u2_.posd->set_address_and_file_offset(address, file_offset); |
1375 | } | |
1376 | ||
a445fddf ILT |
1377 | // Reset the address and file offset. |
1378 | ||
1379 | void | |
1380 | Output_section::Input_section::reset_address_and_file_offset() | |
1381 | { | |
1382 | if (!this->is_input_section()) | |
1383 | this->u2_.posd->reset_address_and_file_offset(); | |
1384 | } | |
1385 | ||
96803768 ILT |
1386 | // Finalize the data size. |
1387 | ||
1388 | void | |
1389 | Output_section::Input_section::finalize_data_size() | |
1390 | { | |
1391 | if (!this->is_input_section()) | |
1392 | this->u2_.posd->finalize_data_size(); | |
b8e6aad9 ILT |
1393 | } |
1394 | ||
1e983657 ILT |
1395 | // Try to turn an input offset into an output offset. We want to |
1396 | // return the output offset relative to the start of this | |
1397 | // Input_section in the output section. | |
b8e6aad9 | 1398 | |
8f00aeb8 | 1399 | inline bool |
8383303e ILT |
1400 | Output_section::Input_section::output_offset( |
1401 | const Relobj* object, | |
1402 | unsigned int shndx, | |
1403 | section_offset_type offset, | |
1404 | section_offset_type *poutput) const | |
b8e6aad9 ILT |
1405 | { |
1406 | if (!this->is_input_section()) | |
730cdc88 | 1407 | return this->u2_.posd->output_offset(object, shndx, offset, poutput); |
b8e6aad9 ILT |
1408 | else |
1409 | { | |
730cdc88 | 1410 | if (this->shndx_ != shndx || this->u2_.object != object) |
b8e6aad9 | 1411 | return false; |
1e983657 | 1412 | *poutput = offset; |
b8e6aad9 ILT |
1413 | return true; |
1414 | } | |
ead1e424 ILT |
1415 | } |
1416 | ||
a9a60db6 ILT |
1417 | // Return whether this is the merge section for the input section |
1418 | // SHNDX in OBJECT. | |
1419 | ||
1420 | inline bool | |
1421 | Output_section::Input_section::is_merge_section_for(const Relobj* object, | |
1422 | unsigned int shndx) const | |
1423 | { | |
1424 | if (this->is_input_section()) | |
1425 | return false; | |
1426 | return this->u2_.posd->is_merge_section_for(object, shndx); | |
1427 | } | |
1428 | ||
ead1e424 ILT |
1429 | // Write out the data. We don't have to do anything for an input |
1430 | // section--they are handled via Object::relocate--but this is where | |
1431 | // we write out the data for an Output_section_data. | |
1432 | ||
1433 | void | |
1434 | Output_section::Input_section::write(Output_file* of) | |
1435 | { | |
1436 | if (!this->is_input_section()) | |
b8e6aad9 | 1437 | this->u2_.posd->write(of); |
ead1e424 ILT |
1438 | } |
1439 | ||
96803768 ILT |
1440 | // Write the data to a buffer. As for write(), we don't have to do |
1441 | // anything for an input section. | |
1442 | ||
1443 | void | |
1444 | Output_section::Input_section::write_to_buffer(unsigned char* buffer) | |
1445 | { | |
1446 | if (!this->is_input_section()) | |
1447 | this->u2_.posd->write_to_buffer(buffer); | |
1448 | } | |
1449 | ||
a2fb1b05 ILT |
1450 | // Output_section methods. |
1451 | ||
1452 | // Construct an Output_section. NAME will point into a Stringpool. | |
1453 | ||
96803768 | 1454 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, |
b8e6aad9 | 1455 | elfcpp::Elf_Xword flags) |
96803768 | 1456 | : name_(name), |
a2fb1b05 ILT |
1457 | addralign_(0), |
1458 | entsize_(0), | |
a445fddf | 1459 | load_address_(0), |
16649710 | 1460 | link_section_(NULL), |
a2fb1b05 | 1461 | link_(0), |
16649710 | 1462 | info_section_(NULL), |
a2fb1b05 ILT |
1463 | info_(0), |
1464 | type_(type), | |
61ba1cf9 | 1465 | flags_(flags), |
91ea499d | 1466 | out_shndx_(-1U), |
c06b7b0b ILT |
1467 | symtab_index_(0), |
1468 | dynsym_index_(0), | |
ead1e424 ILT |
1469 | input_sections_(), |
1470 | first_input_offset_(0), | |
c51e6221 | 1471 | fills_(), |
96803768 | 1472 | postprocessing_buffer_(NULL), |
a3ad94ed | 1473 | needs_symtab_index_(false), |
16649710 ILT |
1474 | needs_dynsym_index_(false), |
1475 | should_link_to_symtab_(false), | |
730cdc88 | 1476 | should_link_to_dynsym_(false), |
27bc2bce | 1477 | after_input_sections_(false), |
7bf1f802 | 1478 | requires_postprocessing_(false), |
a445fddf ILT |
1479 | found_in_sections_clause_(false), |
1480 | has_load_address_(false), | |
7bf1f802 | 1481 | tls_offset_(0) |
a2fb1b05 | 1482 | { |
27bc2bce ILT |
1483 | // An unallocated section has no address. Forcing this means that |
1484 | // we don't need special treatment for symbols defined in debug | |
1485 | // sections. | |
1486 | if ((flags & elfcpp::SHF_ALLOC) == 0) | |
1487 | this->set_address(0); | |
a2fb1b05 ILT |
1488 | } |
1489 | ||
54dc6425 ILT |
1490 | Output_section::~Output_section() |
1491 | { | |
1492 | } | |
1493 | ||
16649710 ILT |
1494 | // Set the entry size. |
1495 | ||
1496 | void | |
1497 | Output_section::set_entsize(uint64_t v) | |
1498 | { | |
1499 | if (this->entsize_ == 0) | |
1500 | this->entsize_ = v; | |
1501 | else | |
1502 | gold_assert(this->entsize_ == v); | |
1503 | } | |
1504 | ||
ead1e424 | 1505 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
730cdc88 ILT |
1506 | // OBJECT, to the Output_section. RELOC_SHNDX is the index of a |
1507 | // relocation section which applies to this section, or 0 if none, or | |
1508 | // -1U if more than one. Return the offset of the input section | |
1509 | // within the output section. Return -1 if the input section will | |
1510 | // receive special handling. In the normal case we don't always keep | |
1511 | // track of input sections for an Output_section. Instead, each | |
1512 | // Object keeps track of the Output_section for each of its input | |
a445fddf ILT |
1513 | // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep |
1514 | // track of input sections here; this is used when SECTIONS appears in | |
1515 | // a linker script. | |
a2fb1b05 ILT |
1516 | |
1517 | template<int size, bool big_endian> | |
1518 | off_t | |
730cdc88 ILT |
1519 | Output_section::add_input_section(Sized_relobj<size, big_endian>* object, |
1520 | unsigned int shndx, | |
ead1e424 | 1521 | const char* secname, |
730cdc88 | 1522 | const elfcpp::Shdr<size, big_endian>& shdr, |
a445fddf ILT |
1523 | unsigned int reloc_shndx, |
1524 | bool have_sections_script) | |
a2fb1b05 ILT |
1525 | { |
1526 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1527 | if ((addralign & (addralign - 1)) != 0) | |
1528 | { | |
75f2446e ILT |
1529 | object->error(_("invalid alignment %lu for section \"%s\""), |
1530 | static_cast<unsigned long>(addralign), secname); | |
1531 | addralign = 1; | |
a2fb1b05 | 1532 | } |
a2fb1b05 ILT |
1533 | |
1534 | if (addralign > this->addralign_) | |
1535 | this->addralign_ = addralign; | |
1536 | ||
44a43cf9 | 1537 | typename elfcpp::Elf_types<size>::Elf_WXword sh_flags = shdr.get_sh_flags(); |
a445fddf ILT |
1538 | this->flags_ |= (sh_flags |
1539 | & (elfcpp::SHF_WRITE | |
1540 | | elfcpp::SHF_ALLOC | |
1541 | | elfcpp::SHF_EXECINSTR)); | |
1542 | ||
4f833eee | 1543 | uint64_t entsize = shdr.get_sh_entsize(); |
44a43cf9 ILT |
1544 | |
1545 | // .debug_str is a mergeable string section, but is not always so | |
1546 | // marked by compilers. Mark manually here so we can optimize. | |
1547 | if (strcmp(secname, ".debug_str") == 0) | |
4f833eee ILT |
1548 | { |
1549 | sh_flags |= (elfcpp::SHF_MERGE | elfcpp::SHF_STRINGS); | |
1550 | entsize = 1; | |
1551 | } | |
44a43cf9 | 1552 | |
b8e6aad9 | 1553 | // If this is a SHF_MERGE section, we pass all the input sections to |
730cdc88 ILT |
1554 | // a Output_data_merge. We don't try to handle relocations for such |
1555 | // a section. | |
44a43cf9 | 1556 | if ((sh_flags & elfcpp::SHF_MERGE) != 0 |
730cdc88 | 1557 | && reloc_shndx == 0) |
b8e6aad9 | 1558 | { |
44a43cf9 | 1559 | if (this->add_merge_input_section(object, shndx, sh_flags, |
96803768 | 1560 | entsize, addralign)) |
b8e6aad9 ILT |
1561 | { |
1562 | // Tell the relocation routines that they need to call the | |
730cdc88 | 1563 | // output_offset method to determine the final address. |
b8e6aad9 ILT |
1564 | return -1; |
1565 | } | |
1566 | } | |
1567 | ||
27bc2bce | 1568 | off_t offset_in_section = this->current_data_size_for_child(); |
c51e6221 ILT |
1569 | off_t aligned_offset_in_section = align_address(offset_in_section, |
1570 | addralign); | |
1571 | ||
1572 | if (aligned_offset_in_section > offset_in_section | |
a445fddf | 1573 | && !have_sections_script |
44a43cf9 | 1574 | && (sh_flags & elfcpp::SHF_EXECINSTR) != 0 |
c51e6221 ILT |
1575 | && object->target()->has_code_fill()) |
1576 | { | |
1577 | // We need to add some fill data. Using fill_list_ when | |
1578 | // possible is an optimization, since we will often have fill | |
1579 | // sections without input sections. | |
1580 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1581 | if (this->input_sections_.empty()) | |
1582 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1583 | else | |
1584 | { | |
1585 | // FIXME: When relaxing, the size needs to adjust to | |
1586 | // maintain a constant alignment. | |
1587 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1588 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1589 | this->input_sections_.push_back(Input_section(odc)); | |
1590 | } | |
1591 | } | |
1592 | ||
27bc2bce ILT |
1593 | this->set_current_data_size_for_child(aligned_offset_in_section |
1594 | + shdr.get_sh_size()); | |
a2fb1b05 | 1595 | |
ead1e424 ILT |
1596 | // We need to keep track of this section if we are already keeping |
1597 | // track of sections, or if we are relaxing. FIXME: Add test for | |
1598 | // relaxing. | |
a445fddf | 1599 | if (have_sections_script || !this->input_sections_.empty()) |
ead1e424 ILT |
1600 | this->input_sections_.push_back(Input_section(object, shndx, |
1601 | shdr.get_sh_size(), | |
1602 | addralign)); | |
54dc6425 | 1603 | |
c51e6221 | 1604 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1605 | } |
1606 | ||
ead1e424 ILT |
1607 | // Add arbitrary data to an output section. |
1608 | ||
1609 | void | |
1610 | Output_section::add_output_section_data(Output_section_data* posd) | |
1611 | { | |
b8e6aad9 ILT |
1612 | Input_section inp(posd); |
1613 | this->add_output_section_data(&inp); | |
a445fddf ILT |
1614 | |
1615 | if (posd->is_data_size_valid()) | |
1616 | { | |
1617 | off_t offset_in_section = this->current_data_size_for_child(); | |
1618 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1619 | posd->addralign()); | |
1620 | this->set_current_data_size_for_child(aligned_offset_in_section | |
1621 | + posd->data_size()); | |
1622 | } | |
b8e6aad9 ILT |
1623 | } |
1624 | ||
1625 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1626 | |
b8e6aad9 ILT |
1627 | void |
1628 | Output_section::add_output_section_data(Input_section* inp) | |
1629 | { | |
ead1e424 | 1630 | if (this->input_sections_.empty()) |
27bc2bce | 1631 | this->first_input_offset_ = this->current_data_size_for_child(); |
c06b7b0b | 1632 | |
b8e6aad9 | 1633 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1634 | |
b8e6aad9 | 1635 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1636 | if (addralign > this->addralign_) |
1637 | this->addralign_ = addralign; | |
c06b7b0b | 1638 | |
b8e6aad9 ILT |
1639 | inp->set_output_section(this); |
1640 | } | |
1641 | ||
1642 | // Add a merge section to an output section. | |
1643 | ||
1644 | void | |
1645 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1646 | bool is_string, uint64_t entsize) | |
1647 | { | |
1648 | Input_section inp(posd, is_string, entsize); | |
1649 | this->add_output_section_data(&inp); | |
1650 | } | |
1651 | ||
1652 | // Add an input section to a SHF_MERGE section. | |
1653 | ||
1654 | bool | |
1655 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1656 | uint64_t flags, uint64_t entsize, | |
96803768 | 1657 | uint64_t addralign) |
b8e6aad9 | 1658 | { |
87f95776 ILT |
1659 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; |
1660 | ||
1661 | // We only merge strings if the alignment is not more than the | |
1662 | // character size. This could be handled, but it's unusual. | |
1663 | if (is_string && addralign > entsize) | |
b8e6aad9 ILT |
1664 | return false; |
1665 | ||
b8e6aad9 ILT |
1666 | Input_section_list::iterator p; |
1667 | for (p = this->input_sections_.begin(); | |
1668 | p != this->input_sections_.end(); | |
1669 | ++p) | |
87f95776 | 1670 | if (p->is_merge_section(is_string, entsize, addralign)) |
9a0910c3 ILT |
1671 | { |
1672 | p->add_input_section(object, shndx); | |
1673 | return true; | |
1674 | } | |
b8e6aad9 ILT |
1675 | |
1676 | // We handle the actual constant merging in Output_merge_data or | |
1677 | // Output_merge_string_data. | |
9a0910c3 ILT |
1678 | Output_section_data* posd; |
1679 | if (!is_string) | |
1680 | posd = new Output_merge_data(entsize, addralign); | |
b8e6aad9 ILT |
1681 | else |
1682 | { | |
9a0910c3 ILT |
1683 | switch (entsize) |
1684 | { | |
1685 | case 1: | |
1686 | posd = new Output_merge_string<char>(addralign); | |
1687 | break; | |
1688 | case 2: | |
1689 | posd = new Output_merge_string<uint16_t>(addralign); | |
1690 | break; | |
1691 | case 4: | |
1692 | posd = new Output_merge_string<uint32_t>(addralign); | |
1693 | break; | |
1694 | default: | |
1695 | return false; | |
1696 | } | |
b8e6aad9 ILT |
1697 | } |
1698 | ||
9a0910c3 ILT |
1699 | this->add_output_merge_section(posd, is_string, entsize); |
1700 | posd->add_input_section(object, shndx); | |
1701 | ||
b8e6aad9 ILT |
1702 | return true; |
1703 | } | |
1704 | ||
730cdc88 ILT |
1705 | // Given an address OFFSET relative to the start of input section |
1706 | // SHNDX in OBJECT, return whether this address is being included in | |
1707 | // the final link. This should only be called if SHNDX in OBJECT has | |
1708 | // a special mapping. | |
1709 | ||
1710 | bool | |
1711 | Output_section::is_input_address_mapped(const Relobj* object, | |
1712 | unsigned int shndx, | |
1713 | off_t offset) const | |
1714 | { | |
1715 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1716 | ||
1717 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1718 | p != this->input_sections_.end(); | |
1719 | ++p) | |
1720 | { | |
8383303e | 1721 | section_offset_type output_offset; |
730cdc88 ILT |
1722 | if (p->output_offset(object, shndx, offset, &output_offset)) |
1723 | return output_offset != -1; | |
1724 | } | |
1725 | ||
1726 | // By default we assume that the address is mapped. This should | |
1727 | // only be called after we have passed all sections to Layout. At | |
1728 | // that point we should know what we are discarding. | |
1729 | return true; | |
1730 | } | |
1731 | ||
1732 | // Given an address OFFSET relative to the start of input section | |
1733 | // SHNDX in object OBJECT, return the output offset relative to the | |
1e983657 ILT |
1734 | // start of the input section in the output section. This should only |
1735 | // be called if SHNDX in OBJECT has a special mapping. | |
730cdc88 | 1736 | |
8383303e | 1737 | section_offset_type |
730cdc88 | 1738 | Output_section::output_offset(const Relobj* object, unsigned int shndx, |
8383303e | 1739 | section_offset_type offset) const |
730cdc88 ILT |
1740 | { |
1741 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1742 | // This can only be called meaningfully when layout is complete. | |
1743 | gold_assert(Output_data::is_layout_complete()); | |
1744 | ||
1745 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1746 | p != this->input_sections_.end(); | |
1747 | ++p) | |
1748 | { | |
8383303e | 1749 | section_offset_type output_offset; |
730cdc88 ILT |
1750 | if (p->output_offset(object, shndx, offset, &output_offset)) |
1751 | return output_offset; | |
1752 | } | |
1753 | gold_unreachable(); | |
1754 | } | |
1755 | ||
b8e6aad9 ILT |
1756 | // Return the output virtual address of OFFSET relative to the start |
1757 | // of input section SHNDX in object OBJECT. | |
1758 | ||
1759 | uint64_t | |
1760 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
1761 | off_t offset) const | |
1762 | { | |
730cdc88 | 1763 | gold_assert(object->is_section_specially_mapped(shndx)); |
730cdc88 | 1764 | |
b8e6aad9 ILT |
1765 | uint64_t addr = this->address() + this->first_input_offset_; |
1766 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1767 | p != this->input_sections_.end(); | |
1768 | ++p) | |
1769 | { | |
1770 | addr = align_address(addr, p->addralign()); | |
8383303e | 1771 | section_offset_type output_offset; |
730cdc88 ILT |
1772 | if (p->output_offset(object, shndx, offset, &output_offset)) |
1773 | { | |
1774 | if (output_offset == -1) | |
1775 | return -1U; | |
1776 | return addr + output_offset; | |
1777 | } | |
b8e6aad9 ILT |
1778 | addr += p->data_size(); |
1779 | } | |
1780 | ||
1781 | // If we get here, it means that we don't know the mapping for this | |
1782 | // input section. This might happen in principle if | |
1783 | // add_input_section were called before add_output_section_data. | |
1784 | // But it should never actually happen. | |
1785 | ||
1786 | gold_unreachable(); | |
ead1e424 ILT |
1787 | } |
1788 | ||
a9a60db6 ILT |
1789 | // Return the output address of the start of the merged section for |
1790 | // input section SHNDX in object OBJECT. | |
1791 | ||
1792 | uint64_t | |
1793 | Output_section::starting_output_address(const Relobj* object, | |
1794 | unsigned int shndx) const | |
1795 | { | |
1796 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1797 | ||
1798 | uint64_t addr = this->address() + this->first_input_offset_; | |
1799 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1800 | p != this->input_sections_.end(); | |
1801 | ++p) | |
1802 | { | |
1803 | addr = align_address(addr, p->addralign()); | |
1804 | ||
1805 | // It would be nice if we could use the existing output_offset | |
1806 | // method to get the output offset of input offset 0. | |
1807 | // Unfortunately we don't know for sure that input offset 0 is | |
1808 | // mapped at all. | |
1809 | if (p->is_merge_section_for(object, shndx)) | |
1810 | return addr; | |
1811 | ||
1812 | addr += p->data_size(); | |
1813 | } | |
1814 | gold_unreachable(); | |
1815 | } | |
1816 | ||
27bc2bce | 1817 | // Set the data size of an Output_section. This is where we handle |
ead1e424 ILT |
1818 | // setting the addresses of any Output_section_data objects. |
1819 | ||
1820 | void | |
27bc2bce | 1821 | Output_section::set_final_data_size() |
ead1e424 ILT |
1822 | { |
1823 | if (this->input_sections_.empty()) | |
27bc2bce ILT |
1824 | { |
1825 | this->set_data_size(this->current_data_size_for_child()); | |
1826 | return; | |
1827 | } | |
ead1e424 | 1828 | |
27bc2bce ILT |
1829 | uint64_t address = this->address(); |
1830 | off_t startoff = this->offset(); | |
ead1e424 ILT |
1831 | off_t off = startoff + this->first_input_offset_; |
1832 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1833 | p != this->input_sections_.end(); | |
1834 | ++p) | |
1835 | { | |
1836 | off = align_address(off, p->addralign()); | |
96803768 ILT |
1837 | p->set_address_and_file_offset(address + (off - startoff), off, |
1838 | startoff); | |
ead1e424 ILT |
1839 | off += p->data_size(); |
1840 | } | |
1841 | ||
1842 | this->set_data_size(off - startoff); | |
1843 | } | |
9a0910c3 | 1844 | |
a445fddf ILT |
1845 | // Reset the address and file offset. |
1846 | ||
1847 | void | |
1848 | Output_section::do_reset_address_and_file_offset() | |
1849 | { | |
1850 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1851 | p != this->input_sections_.end(); | |
1852 | ++p) | |
1853 | p->reset_address_and_file_offset(); | |
1854 | } | |
1855 | ||
7bf1f802 ILT |
1856 | // Set the TLS offset. Called only for SHT_TLS sections. |
1857 | ||
1858 | void | |
1859 | Output_section::do_set_tls_offset(uint64_t tls_base) | |
1860 | { | |
1861 | this->tls_offset_ = this->address() - tls_base; | |
1862 | } | |
1863 | ||
61ba1cf9 ILT |
1864 | // Write the section header to *OSHDR. |
1865 | ||
1866 | template<int size, bool big_endian> | |
1867 | void | |
16649710 ILT |
1868 | Output_section::write_header(const Layout* layout, |
1869 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
1870 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
1871 | { | |
1872 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
1873 | oshdr->put_sh_type(this->type_); | |
1874 | oshdr->put_sh_flags(this->flags_); | |
1875 | oshdr->put_sh_addr(this->address()); | |
1876 | oshdr->put_sh_offset(this->offset()); | |
1877 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
1878 | if (this->link_section_ != NULL) |
1879 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
1880 | else if (this->should_link_to_symtab_) | |
1881 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
1882 | else if (this->should_link_to_dynsym_) | |
1883 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
1884 | else | |
1885 | oshdr->put_sh_link(this->link_); | |
1886 | if (this->info_section_ != NULL) | |
1887 | oshdr->put_sh_info(this->info_section_->out_shndx()); | |
1888 | else | |
1889 | oshdr->put_sh_info(this->info_); | |
61ba1cf9 ILT |
1890 | oshdr->put_sh_addralign(this->addralign_); |
1891 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
1892 | } |
1893 | ||
ead1e424 ILT |
1894 | // Write out the data. For input sections the data is written out by |
1895 | // Object::relocate, but we have to handle Output_section_data objects | |
1896 | // here. | |
1897 | ||
1898 | void | |
1899 | Output_section::do_write(Output_file* of) | |
1900 | { | |
96803768 ILT |
1901 | gold_assert(!this->requires_postprocessing()); |
1902 | ||
c51e6221 ILT |
1903 | off_t output_section_file_offset = this->offset(); |
1904 | for (Fill_list::iterator p = this->fills_.begin(); | |
1905 | p != this->fills_.end(); | |
1906 | ++p) | |
1907 | { | |
14144f39 | 1908 | std::string fill_data(parameters->target()->code_fill(p->length())); |
c51e6221 | 1909 | of->write(output_section_file_offset + p->section_offset(), |
a445fddf | 1910 | fill_data.data(), fill_data.size()); |
c51e6221 ILT |
1911 | } |
1912 | ||
ead1e424 ILT |
1913 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
1914 | p != this->input_sections_.end(); | |
1915 | ++p) | |
1916 | p->write(of); | |
1917 | } | |
1918 | ||
96803768 ILT |
1919 | // If a section requires postprocessing, create the buffer to use. |
1920 | ||
1921 | void | |
1922 | Output_section::create_postprocessing_buffer() | |
1923 | { | |
1924 | gold_assert(this->requires_postprocessing()); | |
1bedcac5 ILT |
1925 | |
1926 | if (this->postprocessing_buffer_ != NULL) | |
1927 | return; | |
96803768 ILT |
1928 | |
1929 | if (!this->input_sections_.empty()) | |
1930 | { | |
1931 | off_t off = this->first_input_offset_; | |
1932 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1933 | p != this->input_sections_.end(); | |
1934 | ++p) | |
1935 | { | |
1936 | off = align_address(off, p->addralign()); | |
1937 | p->finalize_data_size(); | |
1938 | off += p->data_size(); | |
1939 | } | |
1940 | this->set_current_data_size_for_child(off); | |
1941 | } | |
1942 | ||
1943 | off_t buffer_size = this->current_data_size_for_child(); | |
1944 | this->postprocessing_buffer_ = new unsigned char[buffer_size]; | |
1945 | } | |
1946 | ||
1947 | // Write all the data of an Output_section into the postprocessing | |
1948 | // buffer. This is used for sections which require postprocessing, | |
1949 | // such as compression. Input sections are handled by | |
1950 | // Object::Relocate. | |
1951 | ||
1952 | void | |
1953 | Output_section::write_to_postprocessing_buffer() | |
1954 | { | |
1955 | gold_assert(this->requires_postprocessing()); | |
1956 | ||
1957 | Target* target = parameters->target(); | |
1958 | unsigned char* buffer = this->postprocessing_buffer(); | |
1959 | for (Fill_list::iterator p = this->fills_.begin(); | |
1960 | p != this->fills_.end(); | |
1961 | ++p) | |
1962 | { | |
1963 | std::string fill_data(target->code_fill(p->length())); | |
a445fddf ILT |
1964 | memcpy(buffer + p->section_offset(), fill_data.data(), |
1965 | fill_data.size()); | |
96803768 ILT |
1966 | } |
1967 | ||
1968 | off_t off = this->first_input_offset_; | |
1969 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1970 | p != this->input_sections_.end(); | |
1971 | ++p) | |
1972 | { | |
1973 | off = align_address(off, p->addralign()); | |
1974 | p->write_to_buffer(buffer + off); | |
1975 | off += p->data_size(); | |
1976 | } | |
1977 | } | |
1978 | ||
a445fddf ILT |
1979 | // Get the input sections for linker script processing. We leave |
1980 | // behind the Output_section_data entries. Note that this may be | |
1981 | // slightly incorrect for merge sections. We will leave them behind, | |
1982 | // but it is possible that the script says that they should follow | |
1983 | // some other input sections, as in: | |
1984 | // .rodata { *(.rodata) *(.rodata.cst*) } | |
1985 | // For that matter, we don't handle this correctly: | |
1986 | // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) } | |
1987 | // With luck this will never matter. | |
1988 | ||
1989 | uint64_t | |
1990 | Output_section::get_input_sections( | |
1991 | uint64_t address, | |
1992 | const std::string& fill, | |
1993 | std::list<std::pair<Relobj*, unsigned int> >* input_sections) | |
1994 | { | |
1995 | uint64_t orig_address = address; | |
1996 | ||
1997 | address = align_address(address, this->addralign()); | |
1998 | ||
1999 | Input_section_list remaining; | |
2000 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2001 | p != this->input_sections_.end(); | |
2002 | ++p) | |
2003 | { | |
2004 | if (p->is_input_section()) | |
2005 | input_sections->push_back(std::make_pair(p->relobj(), p->shndx())); | |
2006 | else | |
2007 | { | |
2008 | uint64_t aligned_address = align_address(address, p->addralign()); | |
2009 | if (aligned_address != address && !fill.empty()) | |
2010 | { | |
2011 | section_size_type length = | |
2012 | convert_to_section_size_type(aligned_address - address); | |
2013 | std::string this_fill; | |
2014 | this_fill.reserve(length); | |
2015 | while (this_fill.length() + fill.length() <= length) | |
2016 | this_fill += fill; | |
2017 | if (this_fill.length() < length) | |
2018 | this_fill.append(fill, 0, length - this_fill.length()); | |
2019 | ||
2020 | Output_section_data* posd = new Output_data_const(this_fill, 0); | |
2021 | remaining.push_back(Input_section(posd)); | |
2022 | } | |
2023 | address = aligned_address; | |
2024 | ||
2025 | remaining.push_back(*p); | |
2026 | ||
2027 | p->finalize_data_size(); | |
2028 | address += p->data_size(); | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | this->input_sections_.swap(remaining); | |
2033 | this->first_input_offset_ = 0; | |
2034 | ||
2035 | uint64_t data_size = address - orig_address; | |
2036 | this->set_current_data_size_for_child(data_size); | |
2037 | return data_size; | |
2038 | } | |
2039 | ||
2040 | // Add an input section from a script. | |
2041 | ||
2042 | void | |
2043 | Output_section::add_input_section_for_script(Relobj* object, | |
2044 | unsigned int shndx, | |
2045 | off_t data_size, | |
2046 | uint64_t addralign) | |
2047 | { | |
2048 | if (addralign > this->addralign_) | |
2049 | this->addralign_ = addralign; | |
2050 | ||
2051 | off_t offset_in_section = this->current_data_size_for_child(); | |
2052 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
2053 | addralign); | |
2054 | ||
2055 | this->set_current_data_size_for_child(aligned_offset_in_section | |
2056 | + data_size); | |
2057 | ||
2058 | this->input_sections_.push_back(Input_section(object, shndx, | |
2059 | data_size, addralign)); | |
2060 | } | |
2061 | ||
38c5e8b4 ILT |
2062 | // Print stats for merge sections to stderr. |
2063 | ||
2064 | void | |
2065 | Output_section::print_merge_stats() | |
2066 | { | |
2067 | Input_section_list::iterator p; | |
2068 | for (p = this->input_sections_.begin(); | |
2069 | p != this->input_sections_.end(); | |
2070 | ++p) | |
2071 | p->print_merge_stats(this->name_); | |
2072 | } | |
2073 | ||
a2fb1b05 ILT |
2074 | // Output segment methods. |
2075 | ||
2076 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 2077 | : output_data_(), |
75f65a3e | 2078 | output_bss_(), |
a2fb1b05 ILT |
2079 | vaddr_(0), |
2080 | paddr_(0), | |
2081 | memsz_(0), | |
a445fddf ILT |
2082 | max_align_(0), |
2083 | min_p_align_(0), | |
a2fb1b05 ILT |
2084 | offset_(0), |
2085 | filesz_(0), | |
2086 | type_(type), | |
ead1e424 | 2087 | flags_(flags), |
a445fddf ILT |
2088 | is_max_align_known_(false), |
2089 | are_addresses_set_(false) | |
a2fb1b05 ILT |
2090 | { |
2091 | } | |
2092 | ||
2093 | // Add an Output_section to an Output_segment. | |
2094 | ||
2095 | void | |
75f65a3e | 2096 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
2097 | elfcpp::Elf_Word seg_flags, |
2098 | bool front) | |
a2fb1b05 | 2099 | { |
a3ad94ed | 2100 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
a445fddf | 2101 | gold_assert(!this->is_max_align_known_); |
75f65a3e | 2102 | |
ead1e424 | 2103 | // Update the segment flags. |
75f65a3e | 2104 | this->flags_ |= seg_flags; |
75f65a3e ILT |
2105 | |
2106 | Output_segment::Output_data_list* pdl; | |
2107 | if (os->type() == elfcpp::SHT_NOBITS) | |
2108 | pdl = &this->output_bss_; | |
2109 | else | |
2110 | pdl = &this->output_data_; | |
54dc6425 | 2111 | |
a2fb1b05 ILT |
2112 | // So that PT_NOTE segments will work correctly, we need to ensure |
2113 | // that all SHT_NOTE sections are adjacent. This will normally | |
2114 | // happen automatically, because all the SHT_NOTE input sections | |
2115 | // will wind up in the same output section. However, it is possible | |
2116 | // for multiple SHT_NOTE input sections to have different section | |
2117 | // flags, and thus be in different output sections, but for the | |
2118 | // different section flags to map into the same segment flags and | |
2119 | // thus the same output segment. | |
54dc6425 ILT |
2120 | |
2121 | // Note that while there may be many input sections in an output | |
2122 | // section, there are normally only a few output sections in an | |
2123 | // output segment. This loop is expected to be fast. | |
2124 | ||
61ba1cf9 | 2125 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 2126 | { |
a3ad94ed | 2127 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 2128 | do |
54dc6425 | 2129 | { |
75f65a3e | 2130 | --p; |
54dc6425 ILT |
2131 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
2132 | { | |
dbe717ef | 2133 | // We don't worry about the FRONT parameter. |
54dc6425 | 2134 | ++p; |
75f65a3e | 2135 | pdl->insert(p, os); |
54dc6425 ILT |
2136 | return; |
2137 | } | |
2138 | } | |
75f65a3e | 2139 | while (p != pdl->begin()); |
54dc6425 ILT |
2140 | } |
2141 | ||
2142 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
2143 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
2144 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
2145 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
07f397ab ILT |
2146 | // correctly. SHF_TLS sections get added to both a PT_LOAD segment |
2147 | // and the PT_TLS segment -- we do this grouping only for the | |
2148 | // PT_LOAD segment. | |
2149 | if (this->type_ != elfcpp::PT_TLS | |
2150 | && (os->flags() & elfcpp::SHF_TLS) != 0 | |
2151 | && !this->output_data_.empty()) | |
54dc6425 | 2152 | { |
75f65a3e ILT |
2153 | pdl = &this->output_data_; |
2154 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 2155 | bool sawtls = false; |
a3ad94ed | 2156 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 2157 | do |
a2fb1b05 | 2158 | { |
75f65a3e | 2159 | --p; |
ead1e424 ILT |
2160 | bool insert; |
2161 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
2162 | { | |
2163 | sawtls = true; | |
2164 | // Put a NOBITS section after the first TLS section. | |
2165 | // But a PROGBITS section after the first TLS/PROGBITS | |
2166 | // section. | |
2167 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
2168 | } | |
2169 | else | |
2170 | { | |
2171 | // If we've gone past the TLS sections, but we've seen a | |
2172 | // TLS section, then we need to insert this section now. | |
2173 | insert = sawtls; | |
2174 | } | |
2175 | ||
2176 | if (insert) | |
a2fb1b05 | 2177 | { |
dbe717ef | 2178 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 2179 | ++p; |
75f65a3e | 2180 | pdl->insert(p, os); |
a2fb1b05 ILT |
2181 | return; |
2182 | } | |
2183 | } | |
75f65a3e | 2184 | while (p != pdl->begin()); |
ead1e424 | 2185 | |
dbe717ef ILT |
2186 | // There are no TLS sections yet; put this one at the requested |
2187 | // location in the section list. | |
a2fb1b05 ILT |
2188 | } |
2189 | ||
dbe717ef ILT |
2190 | if (front) |
2191 | pdl->push_front(os); | |
2192 | else | |
2193 | pdl->push_back(os); | |
75f65a3e ILT |
2194 | } |
2195 | ||
2196 | // Add an Output_data (which is not an Output_section) to the start of | |
2197 | // a segment. | |
2198 | ||
2199 | void | |
2200 | Output_segment::add_initial_output_data(Output_data* od) | |
2201 | { | |
a445fddf | 2202 | gold_assert(!this->is_max_align_known_); |
75f65a3e ILT |
2203 | this->output_data_.push_front(od); |
2204 | } | |
2205 | ||
2206 | // Return the maximum alignment of the Output_data in Output_segment. | |
75f65a3e ILT |
2207 | |
2208 | uint64_t | |
a445fddf | 2209 | Output_segment::maximum_alignment() |
75f65a3e | 2210 | { |
a445fddf | 2211 | if (!this->is_max_align_known_) |
ead1e424 ILT |
2212 | { |
2213 | uint64_t addralign; | |
2214 | ||
a445fddf ILT |
2215 | addralign = Output_segment::maximum_alignment_list(&this->output_data_); |
2216 | if (addralign > this->max_align_) | |
2217 | this->max_align_ = addralign; | |
ead1e424 | 2218 | |
a445fddf ILT |
2219 | addralign = Output_segment::maximum_alignment_list(&this->output_bss_); |
2220 | if (addralign > this->max_align_) | |
2221 | this->max_align_ = addralign; | |
ead1e424 | 2222 | |
a445fddf | 2223 | this->is_max_align_known_ = true; |
ead1e424 ILT |
2224 | } |
2225 | ||
a445fddf | 2226 | return this->max_align_; |
75f65a3e ILT |
2227 | } |
2228 | ||
ead1e424 ILT |
2229 | // Return the maximum alignment of a list of Output_data. |
2230 | ||
2231 | uint64_t | |
a445fddf | 2232 | Output_segment::maximum_alignment_list(const Output_data_list* pdl) |
ead1e424 ILT |
2233 | { |
2234 | uint64_t ret = 0; | |
2235 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2236 | p != pdl->end(); | |
2237 | ++p) | |
2238 | { | |
2239 | uint64_t addralign = (*p)->addralign(); | |
2240 | if (addralign > ret) | |
2241 | ret = addralign; | |
2242 | } | |
2243 | return ret; | |
2244 | } | |
2245 | ||
4f4c5f80 ILT |
2246 | // Return the number of dynamic relocs applied to this segment. |
2247 | ||
2248 | unsigned int | |
2249 | Output_segment::dynamic_reloc_count() const | |
2250 | { | |
2251 | return (this->dynamic_reloc_count_list(&this->output_data_) | |
2252 | + this->dynamic_reloc_count_list(&this->output_bss_)); | |
2253 | } | |
2254 | ||
2255 | // Return the number of dynamic relocs applied to an Output_data_list. | |
2256 | ||
2257 | unsigned int | |
2258 | Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const | |
2259 | { | |
2260 | unsigned int count = 0; | |
2261 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2262 | p != pdl->end(); | |
2263 | ++p) | |
2264 | count += (*p)->dynamic_reloc_count(); | |
2265 | return count; | |
2266 | } | |
2267 | ||
a445fddf ILT |
2268 | // Set the section addresses for an Output_segment. If RESET is true, |
2269 | // reset the addresses first. ADDR is the address and *POFF is the | |
2270 | // file offset. Set the section indexes starting with *PSHNDX. | |
2271 | // Return the address of the immediately following segment. Update | |
2272 | // *POFF and *PSHNDX. | |
75f65a3e ILT |
2273 | |
2274 | uint64_t | |
a445fddf | 2275 | Output_segment::set_section_addresses(bool reset, uint64_t addr, off_t* poff, |
ead1e424 | 2276 | unsigned int* pshndx) |
75f65a3e | 2277 | { |
a3ad94ed | 2278 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e | 2279 | |
a445fddf ILT |
2280 | if (!reset && this->are_addresses_set_) |
2281 | { | |
2282 | gold_assert(this->paddr_ == addr); | |
2283 | addr = this->vaddr_; | |
2284 | } | |
2285 | else | |
2286 | { | |
2287 | this->vaddr_ = addr; | |
2288 | this->paddr_ = addr; | |
2289 | this->are_addresses_set_ = true; | |
2290 | } | |
75f65a3e ILT |
2291 | |
2292 | off_t orig_off = *poff; | |
2293 | this->offset_ = orig_off; | |
2294 | ||
a445fddf ILT |
2295 | addr = this->set_section_list_addresses(reset, &this->output_data_, |
2296 | addr, poff, pshndx); | |
75f65a3e ILT |
2297 | this->filesz_ = *poff - orig_off; |
2298 | ||
2299 | off_t off = *poff; | |
2300 | ||
a445fddf ILT |
2301 | uint64_t ret = this->set_section_list_addresses(reset, &this->output_bss_, |
2302 | addr, poff, pshndx); | |
75f65a3e ILT |
2303 | this->memsz_ = *poff - orig_off; |
2304 | ||
2305 | // Ignore the file offset adjustments made by the BSS Output_data | |
2306 | // objects. | |
2307 | *poff = off; | |
61ba1cf9 ILT |
2308 | |
2309 | return ret; | |
75f65a3e ILT |
2310 | } |
2311 | ||
b8e6aad9 ILT |
2312 | // Set the addresses and file offsets in a list of Output_data |
2313 | // structures. | |
75f65a3e ILT |
2314 | |
2315 | uint64_t | |
a445fddf | 2316 | Output_segment::set_section_list_addresses(bool reset, Output_data_list* pdl, |
ead1e424 ILT |
2317 | uint64_t addr, off_t* poff, |
2318 | unsigned int* pshndx) | |
75f65a3e | 2319 | { |
ead1e424 | 2320 | off_t startoff = *poff; |
75f65a3e | 2321 | |
ead1e424 | 2322 | off_t off = startoff; |
75f65a3e ILT |
2323 | for (Output_data_list::iterator p = pdl->begin(); |
2324 | p != pdl->end(); | |
2325 | ++p) | |
2326 | { | |
a445fddf ILT |
2327 | if (reset) |
2328 | (*p)->reset_address_and_file_offset(); | |
2329 | ||
2330 | // When using a linker script the section will most likely | |
2331 | // already have an address. | |
2332 | if (!(*p)->is_address_valid()) | |
3802b2dd ILT |
2333 | { |
2334 | off = align_address(off, (*p)->addralign()); | |
2335 | (*p)->set_address_and_file_offset(addr + (off - startoff), off); | |
2336 | } | |
a445fddf ILT |
2337 | else |
2338 | { | |
2339 | // The script may have inserted a skip forward, but it | |
2340 | // better not have moved backward. | |
3802b2dd ILT |
2341 | gold_assert((*p)->address() >= addr + (off - startoff)); |
2342 | off += (*p)->address() - (addr + (off - startoff)); | |
a445fddf ILT |
2343 | (*p)->set_file_offset(off); |
2344 | (*p)->finalize_data_size(); | |
2345 | } | |
ead1e424 ILT |
2346 | |
2347 | // Unless this is a PT_TLS segment, we want to ignore the size | |
2348 | // of a SHF_TLS/SHT_NOBITS section. Such a section does not | |
2349 | // affect the size of a PT_LOAD segment. | |
2350 | if (this->type_ == elfcpp::PT_TLS | |
2351 | || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
2352 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) | |
2353 | off += (*p)->data_size(); | |
75f65a3e | 2354 | |
ead1e424 ILT |
2355 | if ((*p)->is_section()) |
2356 | { | |
2357 | (*p)->set_out_shndx(*pshndx); | |
2358 | ++*pshndx; | |
2359 | } | |
75f65a3e ILT |
2360 | } |
2361 | ||
2362 | *poff = off; | |
ead1e424 | 2363 | return addr + (off - startoff); |
75f65a3e ILT |
2364 | } |
2365 | ||
2366 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
2367 | // any. | |
2368 | ||
2369 | void | |
2370 | Output_segment::set_offset() | |
2371 | { | |
a3ad94ed | 2372 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e | 2373 | |
a445fddf ILT |
2374 | gold_assert(!this->are_addresses_set_); |
2375 | ||
75f65a3e ILT |
2376 | if (this->output_data_.empty() && this->output_bss_.empty()) |
2377 | { | |
2378 | this->vaddr_ = 0; | |
2379 | this->paddr_ = 0; | |
a445fddf | 2380 | this->are_addresses_set_ = true; |
75f65a3e | 2381 | this->memsz_ = 0; |
a445fddf | 2382 | this->min_p_align_ = 0; |
75f65a3e ILT |
2383 | this->offset_ = 0; |
2384 | this->filesz_ = 0; | |
2385 | return; | |
2386 | } | |
2387 | ||
2388 | const Output_data* first; | |
2389 | if (this->output_data_.empty()) | |
2390 | first = this->output_bss_.front(); | |
2391 | else | |
2392 | first = this->output_data_.front(); | |
2393 | this->vaddr_ = first->address(); | |
a445fddf ILT |
2394 | this->paddr_ = (first->has_load_address() |
2395 | ? first->load_address() | |
2396 | : this->vaddr_); | |
2397 | this->are_addresses_set_ = true; | |
75f65a3e ILT |
2398 | this->offset_ = first->offset(); |
2399 | ||
2400 | if (this->output_data_.empty()) | |
2401 | this->filesz_ = 0; | |
2402 | else | |
2403 | { | |
2404 | const Output_data* last_data = this->output_data_.back(); | |
2405 | this->filesz_ = (last_data->address() | |
2406 | + last_data->data_size() | |
2407 | - this->vaddr_); | |
2408 | } | |
2409 | ||
2410 | const Output_data* last; | |
2411 | if (this->output_bss_.empty()) | |
2412 | last = this->output_data_.back(); | |
2413 | else | |
2414 | last = this->output_bss_.back(); | |
2415 | this->memsz_ = (last->address() | |
2416 | + last->data_size() | |
2417 | - this->vaddr_); | |
75f65a3e ILT |
2418 | } |
2419 | ||
7bf1f802 ILT |
2420 | // Set the TLS offsets of the sections in the PT_TLS segment. |
2421 | ||
2422 | void | |
2423 | Output_segment::set_tls_offsets() | |
2424 | { | |
2425 | gold_assert(this->type_ == elfcpp::PT_TLS); | |
2426 | ||
2427 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
2428 | p != this->output_data_.end(); | |
2429 | ++p) | |
2430 | (*p)->set_tls_offset(this->vaddr_); | |
2431 | ||
2432 | for (Output_data_list::iterator p = this->output_bss_.begin(); | |
2433 | p != this->output_bss_.end(); | |
2434 | ++p) | |
2435 | (*p)->set_tls_offset(this->vaddr_); | |
2436 | } | |
2437 | ||
a445fddf ILT |
2438 | // Return the address of the first section. |
2439 | ||
2440 | uint64_t | |
2441 | Output_segment::first_section_load_address() const | |
2442 | { | |
2443 | for (Output_data_list::const_iterator p = this->output_data_.begin(); | |
2444 | p != this->output_data_.end(); | |
2445 | ++p) | |
2446 | if ((*p)->is_section()) | |
2447 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
2448 | ||
2449 | for (Output_data_list::const_iterator p = this->output_bss_.begin(); | |
2450 | p != this->output_bss_.end(); | |
2451 | ++p) | |
2452 | if ((*p)->is_section()) | |
2453 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
2454 | ||
2455 | gold_unreachable(); | |
2456 | } | |
2457 | ||
75f65a3e ILT |
2458 | // Return the number of Output_sections in an Output_segment. |
2459 | ||
2460 | unsigned int | |
2461 | Output_segment::output_section_count() const | |
2462 | { | |
2463 | return (this->output_section_count_list(&this->output_data_) | |
2464 | + this->output_section_count_list(&this->output_bss_)); | |
2465 | } | |
2466 | ||
2467 | // Return the number of Output_sections in an Output_data_list. | |
2468 | ||
2469 | unsigned int | |
2470 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
2471 | { | |
2472 | unsigned int count = 0; | |
2473 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2474 | p != pdl->end(); | |
2475 | ++p) | |
2476 | { | |
2477 | if ((*p)->is_section()) | |
2478 | ++count; | |
2479 | } | |
2480 | return count; | |
a2fb1b05 ILT |
2481 | } |
2482 | ||
1c4f3631 ILT |
2483 | // Return the section attached to the list segment with the lowest |
2484 | // load address. This is used when handling a PHDRS clause in a | |
2485 | // linker script. | |
2486 | ||
2487 | Output_section* | |
2488 | Output_segment::section_with_lowest_load_address() const | |
2489 | { | |
2490 | Output_section* found = NULL; | |
2491 | uint64_t found_lma = 0; | |
2492 | this->lowest_load_address_in_list(&this->output_data_, &found, &found_lma); | |
2493 | ||
2494 | Output_section* found_data = found; | |
2495 | this->lowest_load_address_in_list(&this->output_bss_, &found, &found_lma); | |
2496 | if (found != found_data && found_data != NULL) | |
2497 | { | |
2498 | gold_error(_("nobits section %s may not precede progbits section %s " | |
2499 | "in same segment"), | |
2500 | found->name(), found_data->name()); | |
2501 | return NULL; | |
2502 | } | |
2503 | ||
2504 | return found; | |
2505 | } | |
2506 | ||
2507 | // Look through a list for a section with a lower load address. | |
2508 | ||
2509 | void | |
2510 | Output_segment::lowest_load_address_in_list(const Output_data_list* pdl, | |
2511 | Output_section** found, | |
2512 | uint64_t* found_lma) const | |
2513 | { | |
2514 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2515 | p != pdl->end(); | |
2516 | ++p) | |
2517 | { | |
2518 | if (!(*p)->is_section()) | |
2519 | continue; | |
2520 | Output_section* os = static_cast<Output_section*>(*p); | |
2521 | uint64_t lma = (os->has_load_address() | |
2522 | ? os->load_address() | |
2523 | : os->address()); | |
2524 | if (*found == NULL || lma < *found_lma) | |
2525 | { | |
2526 | *found = os; | |
2527 | *found_lma = lma; | |
2528 | } | |
2529 | } | |
2530 | } | |
2531 | ||
61ba1cf9 ILT |
2532 | // Write the segment data into *OPHDR. |
2533 | ||
2534 | template<int size, bool big_endian> | |
2535 | void | |
ead1e424 | 2536 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
2537 | { |
2538 | ophdr->put_p_type(this->type_); | |
2539 | ophdr->put_p_offset(this->offset_); | |
2540 | ophdr->put_p_vaddr(this->vaddr_); | |
2541 | ophdr->put_p_paddr(this->paddr_); | |
2542 | ophdr->put_p_filesz(this->filesz_); | |
2543 | ophdr->put_p_memsz(this->memsz_); | |
2544 | ophdr->put_p_flags(this->flags_); | |
a445fddf | 2545 | ophdr->put_p_align(std::max(this->min_p_align_, this->maximum_alignment())); |
61ba1cf9 ILT |
2546 | } |
2547 | ||
2548 | // Write the section headers into V. | |
2549 | ||
2550 | template<int size, bool big_endian> | |
2551 | unsigned char* | |
16649710 ILT |
2552 | Output_segment::write_section_headers(const Layout* layout, |
2553 | const Stringpool* secnamepool, | |
ead1e424 ILT |
2554 | unsigned char* v, |
2555 | unsigned int *pshndx | |
5482377d ILT |
2556 | ACCEPT_SIZE_ENDIAN) const |
2557 | { | |
ead1e424 ILT |
2558 | // Every section that is attached to a segment must be attached to a |
2559 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
2560 | // segments. | |
2561 | if (this->type_ != elfcpp::PT_LOAD) | |
2562 | return v; | |
2563 | ||
593f47df ILT |
2564 | v = this->write_section_headers_list |
2565 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 2566 | layout, secnamepool, &this->output_data_, v, pshndx |
593f47df ILT |
2567 | SELECT_SIZE_ENDIAN(size, big_endian)); |
2568 | v = this->write_section_headers_list | |
2569 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 2570 | layout, secnamepool, &this->output_bss_, v, pshndx |
593f47df | 2571 | SELECT_SIZE_ENDIAN(size, big_endian)); |
61ba1cf9 ILT |
2572 | return v; |
2573 | } | |
2574 | ||
2575 | template<int size, bool big_endian> | |
2576 | unsigned char* | |
16649710 ILT |
2577 | Output_segment::write_section_headers_list(const Layout* layout, |
2578 | const Stringpool* secnamepool, | |
61ba1cf9 | 2579 | const Output_data_list* pdl, |
ead1e424 ILT |
2580 | unsigned char* v, |
2581 | unsigned int* pshndx | |
5482377d | 2582 | ACCEPT_SIZE_ENDIAN) const |
61ba1cf9 ILT |
2583 | { |
2584 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2585 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2586 | p != pdl->end(); | |
2587 | ++p) | |
2588 | { | |
2589 | if ((*p)->is_section()) | |
2590 | { | |
5482377d | 2591 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 2592 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 2593 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 2594 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 2595 | v += shdr_size; |
ead1e424 | 2596 | ++*pshndx; |
61ba1cf9 ILT |
2597 | } |
2598 | } | |
2599 | return v; | |
2600 | } | |
2601 | ||
a2fb1b05 ILT |
2602 | // Output_file methods. |
2603 | ||
14144f39 ILT |
2604 | Output_file::Output_file(const char* name) |
2605 | : name_(name), | |
61ba1cf9 ILT |
2606 | o_(-1), |
2607 | file_size_(0), | |
c420411f ILT |
2608 | base_(NULL), |
2609 | map_is_anonymous_(false) | |
61ba1cf9 ILT |
2610 | { |
2611 | } | |
2612 | ||
2613 | // Open the output file. | |
2614 | ||
a2fb1b05 | 2615 | void |
61ba1cf9 | 2616 | Output_file::open(off_t file_size) |
a2fb1b05 | 2617 | { |
61ba1cf9 ILT |
2618 | this->file_size_ = file_size; |
2619 | ||
4e9d8586 ILT |
2620 | // Unlink the file first; otherwise the open() may fail if the file |
2621 | // is busy (e.g. it's an executable that's currently being executed). | |
2622 | // | |
2623 | // However, the linker may be part of a system where a zero-length | |
2624 | // file is created for it to write to, with tight permissions (gcc | |
2625 | // 2.95 did something like this). Unlinking the file would work | |
2626 | // around those permission controls, so we only unlink if the file | |
2627 | // has a non-zero size. We also unlink only regular files to avoid | |
2628 | // trouble with directories/etc. | |
2629 | // | |
2630 | // If we fail, continue; this command is merely a best-effort attempt | |
2631 | // to improve the odds for open(). | |
2632 | ||
42a1b686 ILT |
2633 | // We let the name "-" mean "stdout" |
2634 | if (strcmp(this->name_, "-") == 0) | |
2635 | this->o_ = STDOUT_FILENO; | |
2636 | else | |
2637 | { | |
2638 | struct stat s; | |
2639 | if (::stat(this->name_, &s) == 0 && s.st_size != 0) | |
2640 | unlink_if_ordinary(this->name_); | |
2641 | ||
2642 | int mode = parameters->output_is_object() ? 0666 : 0777; | |
2643 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); | |
2644 | if (o < 0) | |
2645 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); | |
2646 | this->o_ = o; | |
2647 | } | |
61ba1cf9 | 2648 | |
27bc2bce ILT |
2649 | this->map(); |
2650 | } | |
2651 | ||
2652 | // Resize the output file. | |
2653 | ||
2654 | void | |
2655 | Output_file::resize(off_t file_size) | |
2656 | { | |
c420411f ILT |
2657 | // If the mmap is mapping an anonymous memory buffer, this is easy: |
2658 | // just mremap to the new size. If it's mapping to a file, we want | |
2659 | // to unmap to flush to the file, then remap after growing the file. | |
2660 | if (this->map_is_anonymous_) | |
2661 | { | |
2662 | void* base = ::mremap(this->base_, this->file_size_, file_size, | |
2663 | MREMAP_MAYMOVE); | |
2664 | if (base == MAP_FAILED) | |
2665 | gold_fatal(_("%s: mremap: %s"), this->name_, strerror(errno)); | |
2666 | this->base_ = static_cast<unsigned char*>(base); | |
2667 | this->file_size_ = file_size; | |
2668 | } | |
2669 | else | |
2670 | { | |
2671 | this->unmap(); | |
2672 | this->file_size_ = file_size; | |
2673 | this->map(); | |
2674 | } | |
27bc2bce ILT |
2675 | } |
2676 | ||
2677 | // Map the file into memory. | |
2678 | ||
2679 | void | |
2680 | Output_file::map() | |
2681 | { | |
c420411f | 2682 | const int o = this->o_; |
61ba1cf9 | 2683 | |
c420411f ILT |
2684 | // If the output file is not a regular file, don't try to mmap it; |
2685 | // instead, we'll mmap a block of memory (an anonymous buffer), and | |
2686 | // then later write the buffer to the file. | |
2687 | void* base; | |
2688 | struct stat statbuf; | |
42a1b686 ILT |
2689 | if (o == STDOUT_FILENO || o == STDERR_FILENO |
2690 | || ::fstat(o, &statbuf) != 0 | |
c420411f ILT |
2691 | || !S_ISREG(statbuf.st_mode)) |
2692 | { | |
2693 | this->map_is_anonymous_ = true; | |
2694 | base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, | |
2695 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
2696 | } | |
2697 | else | |
2698 | { | |
2699 | // Write out one byte to make the file the right size. | |
2700 | if (::lseek(o, this->file_size_ - 1, SEEK_SET) < 0) | |
2701 | gold_fatal(_("%s: lseek: %s"), this->name_, strerror(errno)); | |
2702 | char b = 0; | |
2703 | if (::write(o, &b, 1) != 1) | |
2704 | gold_fatal(_("%s: write: %s"), this->name_, strerror(errno)); | |
2705 | ||
2706 | // Map the file into memory. | |
2707 | this->map_is_anonymous_ = false; | |
2708 | base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, | |
2709 | MAP_SHARED, o, 0); | |
2710 | } | |
61ba1cf9 | 2711 | if (base == MAP_FAILED) |
75f2446e | 2712 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
2713 | this->base_ = static_cast<unsigned char*>(base); |
2714 | } | |
2715 | ||
c420411f | 2716 | // Unmap the file from memory. |
61ba1cf9 ILT |
2717 | |
2718 | void | |
c420411f | 2719 | Output_file::unmap() |
61ba1cf9 ILT |
2720 | { |
2721 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 2722 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 2723 | this->base_ = NULL; |
c420411f ILT |
2724 | } |
2725 | ||
2726 | // Close the output file. | |
2727 | ||
2728 | void | |
2729 | Output_file::close() | |
2730 | { | |
2731 | // If the map isn't file-backed, we need to write it now. | |
2732 | if (this->map_is_anonymous_) | |
2733 | { | |
2734 | size_t bytes_to_write = this->file_size_; | |
2735 | while (bytes_to_write > 0) | |
2736 | { | |
2737 | ssize_t bytes_written = ::write(this->o_, this->base_, bytes_to_write); | |
2738 | if (bytes_written == 0) | |
2739 | gold_error(_("%s: write: unexpected 0 return-value"), this->name_); | |
2740 | else if (bytes_written < 0) | |
2741 | gold_error(_("%s: write: %s"), this->name_, strerror(errno)); | |
2742 | else | |
2743 | bytes_to_write -= bytes_written; | |
2744 | } | |
2745 | } | |
2746 | this->unmap(); | |
61ba1cf9 | 2747 | |
42a1b686 ILT |
2748 | // We don't close stdout or stderr |
2749 | if (this->o_ != STDOUT_FILENO && this->o_ != STDERR_FILENO) | |
2750 | if (::close(this->o_) < 0) | |
2751 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); | |
61ba1cf9 | 2752 | this->o_ = -1; |
a2fb1b05 ILT |
2753 | } |
2754 | ||
2755 | // Instantiate the templates we need. We could use the configure | |
2756 | // script to restrict this to only the ones for implemented targets. | |
2757 | ||
193a53d9 | 2758 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
2759 | template |
2760 | off_t | |
2761 | Output_section::add_input_section<32, false>( | |
730cdc88 | 2762 | Sized_relobj<32, false>* object, |
ead1e424 | 2763 | unsigned int shndx, |
a2fb1b05 | 2764 | const char* secname, |
730cdc88 | 2765 | const elfcpp::Shdr<32, false>& shdr, |
a445fddf ILT |
2766 | unsigned int reloc_shndx, |
2767 | bool have_sections_script); | |
193a53d9 | 2768 | #endif |
a2fb1b05 | 2769 | |
193a53d9 | 2770 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
2771 | template |
2772 | off_t | |
2773 | Output_section::add_input_section<32, true>( | |
730cdc88 | 2774 | Sized_relobj<32, true>* object, |
ead1e424 | 2775 | unsigned int shndx, |
a2fb1b05 | 2776 | const char* secname, |
730cdc88 | 2777 | const elfcpp::Shdr<32, true>& shdr, |
a445fddf ILT |
2778 | unsigned int reloc_shndx, |
2779 | bool have_sections_script); | |
193a53d9 | 2780 | #endif |
a2fb1b05 | 2781 | |
193a53d9 | 2782 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
2783 | template |
2784 | off_t | |
2785 | Output_section::add_input_section<64, false>( | |
730cdc88 | 2786 | Sized_relobj<64, false>* object, |
ead1e424 | 2787 | unsigned int shndx, |
a2fb1b05 | 2788 | const char* secname, |
730cdc88 | 2789 | const elfcpp::Shdr<64, false>& shdr, |
a445fddf ILT |
2790 | unsigned int reloc_shndx, |
2791 | bool have_sections_script); | |
193a53d9 | 2792 | #endif |
a2fb1b05 | 2793 | |
193a53d9 | 2794 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
2795 | template |
2796 | off_t | |
2797 | Output_section::add_input_section<64, true>( | |
730cdc88 | 2798 | Sized_relobj<64, true>* object, |
ead1e424 | 2799 | unsigned int shndx, |
a2fb1b05 | 2800 | const char* secname, |
730cdc88 | 2801 | const elfcpp::Shdr<64, true>& shdr, |
a445fddf ILT |
2802 | unsigned int reloc_shndx, |
2803 | bool have_sections_script); | |
193a53d9 | 2804 | #endif |
a2fb1b05 | 2805 | |
193a53d9 | 2806 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
2807 | template |
2808 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 2809 | #endif |
c06b7b0b | 2810 | |
193a53d9 | 2811 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
2812 | template |
2813 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 2814 | #endif |
c06b7b0b | 2815 | |
193a53d9 | 2816 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2817 | template |
2818 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 2819 | #endif |
c06b7b0b | 2820 | |
193a53d9 | 2821 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2822 | template |
2823 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 2824 | #endif |
c06b7b0b | 2825 | |
193a53d9 | 2826 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
2827 | template |
2828 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 2829 | #endif |
c06b7b0b | 2830 | |
193a53d9 | 2831 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
2832 | template |
2833 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 2834 | #endif |
c06b7b0b | 2835 | |
193a53d9 | 2836 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2837 | template |
2838 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 2839 | #endif |
c06b7b0b | 2840 | |
193a53d9 | 2841 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2842 | template |
2843 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 2844 | #endif |
c06b7b0b | 2845 | |
193a53d9 | 2846 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
2847 | template |
2848 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 2849 | #endif |
c06b7b0b | 2850 | |
193a53d9 | 2851 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
2852 | template |
2853 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 2854 | #endif |
c06b7b0b | 2855 | |
193a53d9 | 2856 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2857 | template |
2858 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 2859 | #endif |
c06b7b0b | 2860 | |
193a53d9 | 2861 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2862 | template |
2863 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 2864 | #endif |
c06b7b0b | 2865 | |
193a53d9 | 2866 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
2867 | template |
2868 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 2869 | #endif |
c06b7b0b | 2870 | |
193a53d9 | 2871 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
2872 | template |
2873 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 2874 | #endif |
c06b7b0b | 2875 | |
193a53d9 | 2876 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2877 | template |
2878 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 2879 | #endif |
c06b7b0b | 2880 | |
193a53d9 | 2881 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2882 | template |
2883 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 2884 | #endif |
c06b7b0b | 2885 | |
193a53d9 | 2886 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 2887 | template |
dbe717ef | 2888 | class Output_data_got<32, false>; |
193a53d9 | 2889 | #endif |
ead1e424 | 2890 | |
193a53d9 | 2891 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 2892 | template |
dbe717ef | 2893 | class Output_data_got<32, true>; |
193a53d9 | 2894 | #endif |
ead1e424 | 2895 | |
193a53d9 | 2896 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 2897 | template |
dbe717ef | 2898 | class Output_data_got<64, false>; |
193a53d9 | 2899 | #endif |
ead1e424 | 2900 | |
193a53d9 | 2901 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 2902 | template |
dbe717ef | 2903 | class Output_data_got<64, true>; |
193a53d9 | 2904 | #endif |
ead1e424 | 2905 | |
a2fb1b05 | 2906 | } // End namespace gold. |